From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Wed, 7 Feb 2024 16:47:21 +0000 (+0100)
Subject: Handle streaming PGNs, like from Lichess (although this might break non-streaming... 
X-Git-Url: https://git.sesse.net/?p=remoteglot;a=commitdiff_plain;h=HEAD;hp=04509c20d2edea71df6e9c440d3260458e3cc34a

Handle streaming PGNs, like from Lichess (although this might break non-streaming ones).
---

diff --git a/.gitignore b/.gitignore
index c6b42d3..3134bf1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,9 +2,11 @@ config.local.pm
 junk/
 www/analysis.json
 www/js/remoteglot.min.js
+www/css/remoteglot.min.css
 tblog.txt
 ucilog.txt
 ficslog.txt
 openings.txt
 www/history/
 closure/
+index.html
diff --git a/Position.pm b/Position.pm
index 3e39e46..9e9fe29 100644
--- a/Position.pm
+++ b/Position.pm
@@ -191,6 +191,8 @@ sub fen {
 sub to_json_hash {
 	my $pos = shift;
 	my $json = { %$pos, fen => $pos->fen() };
+	delete $json->{'toplay'};
+	delete $json->{'move_num'};
 	delete $json->{'board'};
 	delete $json->{'prettyprint_cache'};
 	delete $json->{'tbprobe_cache'};
diff --git a/build.sh b/build.sh
index 9f97e35..75141e4 100755
--- a/build.sh
+++ b/build.sh
@@ -1,21 +1,19 @@
 #! /bin/sh
 
-# Download http://dl.google.com/closure-compiler/compiler-latest.zip
-# and unzip it in closure/ before running this script.
+# Download the latest .jar from
+# https://mvnrepository.com/artifact/com.google.javascript/closure-compiler/v20231112
+# (adjust the URL for the version you want) before running this script.
 
-# The JQuery build comes from http://projects.jga.me/jquery-builder/,
-# more specifically
-#
-# https://raw.githubusercontent.com/jgallen23/jquery-builder/0.7.0/dist/2.1.1/jquery-deprecated-sizzle.js
+umask 022
 
-java -jar closure/compiler.jar \
-	--language_in ECMASCRIPT5 \
+java -jar closure-compiler-v20231112.jar \
 	--compilation_level SIMPLE \
 	--js_output_file=www/js/remoteglot.min.js \
-        www/js/jquery-deprecated-sizzle.js \
 	www/js/chessboard-0.3.0.js \
 	www/js/chess.js \
 	www/js/json_delta.js \
-	www/js/jquery.sparkline.js \
 	www/js/remoteglot.js
 
+cat www/css/chessboard-0.3.0.css www/css/remoteglot.css | sass --scss -t compressed > www/css/remoteglot.min.css
+perl replace.pl < www/index.dev.html > www/index.html
+
diff --git a/clean-svg.pl b/clean-svg.pl
new file mode 100644
index 0000000..e102edb
--- /dev/null
+++ b/clean-svg.pl
@@ -0,0 +1,26 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+use MIME::Base64;
+
+undef $/;
+my $x = <>;
+$x = MIME::Base64::decode_base64($x);
+$x =~ s/>\s*</></sg;  # Remove whitespace between tags.
+$x =~ s/\s+/ /sg;  # Compress whitespace.
+$x =~ s# />#/>#g;  # <foo /> -> <foo/>.
+$x =~ s/;\s+/;/sg; # Remove whitespace in CSS.
+$x =~ s/;"/"/g;   # Remove final semicolon in CSS.
+$x =~ s/\s+$//;  # Remove tailing whitespace.
+$x =~ s/><!DOCTYPE/>\n<!DOCTYPE/;  # Add back newline after XML header.
+$x =~ s/<svg/\n<svg/;   # Add back newline after DOCTYPE.
+
+print $x, "\n";
+print MIME::Base64::encode_base64($x, ""), "\n";
+
+my $z = $x;
+$z =~ s/%/%25/g;
+$z =~ s/\n/%0A/g;
+$z =~ s/"/%22/g;
+$z =~ s/#/%23/g;
+print $z, "\n";
diff --git a/config.pm b/config.pm
index 44ed56b..073ab92 100644
--- a/config.pm
+++ b/config.pm
@@ -4,10 +4,6 @@
 
 package remoteglotconf;
 
-our $server = "freechess.org";  # undef to not connect to FICS.
-our $nick = "SesseBOT";
-our $target = "GMCarlsen";  # FICS username or HTTP to a PGN file.
-
 # Set to non-undef to pick out one specific game from a PGN file with many games.
 # See example.
 our $pgn_filter = undef;
@@ -58,6 +54,7 @@ our %engine2_config = (
 our $engine2_grpc_backend = undef;  # Not used by us, but will be communicated to serve-analysis.js.
 
 our $update_max_interval = 1.0;
+our $update_force_after_move = 0.2;
 our @masters = (
 	'Sesse',
 );
@@ -66,11 +63,6 @@ our @masters = (
 # including the --path= argument.
 our $fathom_cmdline = undef;
 
-# ChessOK serial key (of the form NNNNN-NNNNN-NNNNN-NNNNN-NNNNN-NNNNN)
-# for looking up 7-man tablebases; undef means no lookup. Note that
-# you probably need specific prior permission to use this.
-our $tb_serial_key = undef;
-
 # Credits to show in the footer.
 our $engine_url = "http://www.stockfishchess.org/";
 our $engine_details = undef;  # For hardware.
@@ -82,6 +74,12 @@ our $dbistr = "dbi:Pg:dbname=remoteglot";
 our $dbiuser = undef;
 our $dbipass = undef;
 
+# For manual moves made from the web interface.
+our $adminpass = undef;
+
+# How often to poll the target, in seconds.
+our $poll_frequency = 1.0;
+
 eval {
 	my $config_filename = $ENV{'REMOTEGLOT_CONFIG'} // 'config.local.pm';
 	require $config_filename;
diff --git a/remoteglot.pl b/remoteglot.pl
index 9d611c0..b5db356 100755
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -1,9 +1,8 @@
 #! /usr/bin/perl
 
 #
-# remoteglot - Connects an abitrary UCI-speaking engine to ICS for easier post-game
-#              analysis, or for live analysis of relayed games. (Do not use for
-#              cheating! Cheating is bad for your karma, and your abuser flag.)
+# remoteglot - Connects an abitrary UCI-speaking engine to a (live) PGN,
+#              for live analysis of relayed games.
 #
 # Copyright 2007 Steinar H. Gunderson <steinar+remoteglot@gunderson.no>
 # Licensed under the GNU General Public License, version 2.
@@ -14,7 +13,6 @@ use AnyEvent::Handle;
 use AnyEvent::HTTP;
 use Chess::PGN::Parse;
 use EV;
-use Net::Telnet;
 use File::Slurp;
 use IPC::Open2;
 use Time::HiRes;
@@ -35,7 +33,6 @@ my $output_timer = undef;
 my $http_timer = undef;
 my $stop_pgn_fetch = 0;
 my $tb_retry_timer = undef;
-my %tb_cache = ();
 my $tb_lookup_running = 0;
 my $last_written_json = undef;
 
@@ -48,12 +45,6 @@ $dbh->{RaiseError} = 1;
 
 $| = 1;
 
-open(FICSLOG, ">ficslog.txt")
-	or die "ficslog.txt: $!";
-print FICSLOG "Log starting.\n";
-select(FICSLOG);
-$| = 1;
-
 open(UCILOG, ">ucilog.txt")
 	or die "ucilog.txt: $!";
 print UCILOG "Log starting.\n";
@@ -76,6 +67,15 @@ my $last_move;
 my $last_text = '';
 my ($pos_calculating, $pos_calculating_second_engine);
 
+# If not undef, we've started calculating this position but haven't ever given out
+# any analysis for it, so we're on a forced timer to do so.
+my $pos_calculating_started = undef;
+
+# If not undef, we've output this position, but without a main PV, so we're on
+# _another_ forced timer to do so.
+my $pos_pv_started = undef;
+my $last_output_had_pv = 0;
+
 setoptions($engine, \%remoteglotconf::engine_config);
 uciprint($engine, "ucinewgame");
 
@@ -87,46 +87,14 @@ if (defined($engine2)) {
 
 print "Chess engine ready.\n";
 
-# now talk to FICS
-my ($t, $ev1);
-if (defined($remoteglotconf::server)) {
-	$t = Net::Telnet->new(Timeout => 10, Prompt => '/fics% /');
-	$t->input_log(\*FICSLOG);
-	$t->open($remoteglotconf::server);
-	$t->print($remoteglotconf::nick);
-	$t->waitfor('/Press return to enter the server/');
-	$t->cmd("");
-
-	# set some options
-	$t->cmd("set shout 0");
-	$t->cmd("set seek 0");
-	$t->cmd("set style 12");
-
-	$ev1 = AnyEvent->io(
-		fh => fileno($t),
-		poll => 'r',
-		cb => sub {    # what callback to execute
-			while (1) {
-				my $line = $t->getline(Timeout => 0, errmode => 'return');
-				return if (!defined($line));
-
-				chomp $line;
-				$line =~ tr/\r//d;
-				handle_fics($line);
-			}
-		}
-	);
-}
 if (defined($remoteglotconf::target)) {
 	if ($remoteglotconf::target =~ /^(?:\/|https?:)/) {
-		fetch_pgn($remoteglotconf::target);
-	} elsif (defined($t)) {
-		$t->cmd("observe $remoteglotconf::target");
+		my $target = $remoteglotconf::target;
+		# Convenience.
+		$target =~ s#https://lichess.org/broadcast/.*/([^/]+)?$#https://lichess.org/api/stream/broadcast/round/$1.pgn#;
+		fetch_pgn($target);
 	}
 }
-if (defined($t)) {
-	print "FICS ready.\n";
-}
 
 # Engine events have already been set up by Engine.pm.
 EV::run;
@@ -143,7 +111,7 @@ sub handle_uci {
 	return if ($engine->{'stopping'} && $line !~ /^bestmove/);
 	$engine->{'stopping'} = 0;
 
-	if ($line =~ /^info/) {
+	if ($line =~ /^info/ && $line !~ / cluster /) {
 		my (@infos) = split / /, $line;
 		shift @infos;
 
@@ -163,82 +131,6 @@ my $pos_for_movelist = undef;
 my @uci_movelist = ();
 my @pretty_movelist = ();
 
-sub handle_fics {
-	my $line = shift;
-	if ($line =~ /^<12> /) {
-		handle_position(Position->new($line));
-		$t->cmd("moves");
-	}
-	if ($line =~ /^Movelist for game /) {
-		my $pos = $pos_calculating;
-		if (defined($pos)) {
-			@uci_movelist = ();
-			@pretty_movelist = ();
-			$pos_for_movelist = Position->start_pos($pos->{'player_w'}, $pos->{'player_b'});
-			$getting_movelist = 1;
-		}
-	}
-	if ($getting_movelist &&
-	    $line =~ /^\s* \d+\. \s+                     # move number
-                       (\S+) \s+ \( [\d:.]+ \) \s*       # first move, then time
-	               (?: (\S+) \s+ \( [\d:.]+ \) )?    # second move, then time 
-	             /x) {
-		eval {
-			my $uci_move;
-			($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($1);
-			push @uci_movelist, $uci_move;
-			push @pretty_movelist, $1;
-
-			if (defined($2)) {
-				($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($2);
-				push @uci_movelist, $uci_move;
-				push @pretty_movelist, $2;
-			}
-		};
-		if ($@) {
-			warn "Error when getting FICS move history: $@";
-			$getting_movelist = 0;
-		}
-	}
-	if ($getting_movelist &&
-	    $line =~ /^\s+ \{.*\} \s+ (?: \* | 1\/2-1\/2 | 0-1 | 1-0 )/x) {
-		# End of movelist.
-		if (defined($pos_calculating)) {
-			if ($pos_calculating->fen() eq $pos_for_movelist->fen()) {
-				$pos_calculating->{'history'} = \@pretty_movelist;
-			}
-		}
-		$getting_movelist = 0;
-	}
-	if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
-		my ($who, $msg) = ($1, $2);
-
-		next if (grep { $_ eq $who } (@remoteglotconf::masters) == 0);
-
-		if ($msg =~ /^fics (.*?)$/) {
-			$t->cmd("tell $who Executing '$1' on FICS.");
-			$t->cmd($1);
-		} elsif ($msg =~ /^uci (.*?)$/) {
-			$t->cmd("tell $who Sending '$1' to the engine.");
-			print { $engine->{'write'} } "$1\n";
-		} elsif ($msg =~ /^pgn (.*?)$/) {
-			my $url = $1;
-			$t->cmd("tell $who Starting to poll '$url'.");
-			fetch_pgn($url);
-		} elsif ($msg =~ /^stoppgn$/) {
-			$t->cmd("tell $who Stopping poll.");
-			$stop_pgn_fetch = 1;
-			$http_timer = undef;
-		} elsif ($msg =~ /^quit$/) {
-			$t->cmd("tell $who Bye bye.");
-			exit;
-		} else {
-			$t->cmd("tell $who Couldn't understand '$msg', sorry.");
-		}
-	}
-	#print "FICS: [$line]\n";
-}
-
 # Starts periodic fetching of PGNs from the given URL.
 sub fetch_pgn {
 	my ($url) = @_;
@@ -253,14 +145,19 @@ sub fetch_pgn {
 		};
 		if ($@) {
 			warn "$url: $@";
-			$http_timer = AnyEvent->timer(after => 1.0, cb => sub {
+			$http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
 				fetch_pgn($url);
 			});
 		}
 	} else {
-		AnyEvent::HTTP::http_get($url, sub {
-			handle_pgn(@_, $url);
-		});
+		my $buffer = '';
+		AnyEvent::HTTP::http_get($url,
+			on_body => sub {
+				handle_partial_pgn(@_, \$buffer, $url);
+			},
+			sub {
+				end_pgn(@_, \$buffer, $url);
+			});
 	}
 }
 
@@ -268,14 +165,32 @@ my ($last_pgn_white, $last_pgn_black);
 my @last_pgn_uci_moves = ();
 my $pgn_hysteresis_counter = 0;
 
-sub handle_pgn {
-	my ($body, $header, $url) = @_;
+sub handle_partial_pgn {
+	my ($body, $header, $buffer, $url) = @_;
 
 	if ($stop_pgn_fetch) {
 		$stop_pgn_fetch = 0;
 		$http_timer = undef;
-		return;
+		return 0;
 	}
+	$$buffer .= $body;
+	while ($$buffer =~ s/^\s*(.*)\n\n\n//s) {
+		handle_pgn($1, $url);
+	}
+	return 1;
+}
+
+sub end_pgn {
+	my ($body, $header, $buffer, $url) = @_;
+	handle_pgn($$buffer, $url);
+	$$buffer = "";
+	$http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
+		fetch_pgn($url);
+	});
+}
+
+sub handle_pgn {
+	my ($body, $url) = @_;
 
 	my $pgn = Chess::PGN::Parse->new(undef, $body);
 	if (!defined($pgn)) {
@@ -330,9 +245,12 @@ sub handle_pgn {
 			if ($pgn->result eq '1-0' || $pgn->result eq '1/2-1/2' || $pgn->result eq '0-1') {
 				$pos->{'result'} = $pgn->result;
 			}
-			$pos->{'history'} = \@repretty_moves;
 
+			my @extra_moves = ();
+			$pos = extend_from_manual_override($pos, \@repretty_moves, \@extra_moves);
 			extract_clock($pgn, $pos);
+			$pos->{'history'} = \@repretty_moves;
+			$pos->{'extra_moves'} = \@extra_moves;
 
 			# Sometimes, PGNs lose a move or two for a short while,
 			# or people push out new ones non-atomically. 
@@ -360,7 +278,7 @@ sub handle_pgn {
 		}
 	}
 	
-	$http_timer = AnyEvent->timer(after => 1.0, cb => sub {
+	$http_timer = AnyEvent->timer(after => $remoteglotconf::poll_frequency, cb => sub {
 		fetch_pgn($url);
 	});
 }
@@ -376,6 +294,7 @@ sub handle_position {
 		for my $key ('white_clock', 'black_clock', 'white_clock_target', 'black_clock_target') {
 			$pos_calculating->{$key} //= $pos->{$key};
 		}
+		$pos_calculating->{'extra_moves'} = $pos->{'extra_moves'};
 		return;
 	}
 
@@ -388,12 +307,23 @@ sub handle_position {
 		# the position.)
 		#
 		# Do not output anything new to the main analysis; that's
-		# going to be obsolete really soon.
+		# going to be obsolete really soon. (Exception: If we've never
+		# output anything for this move, ie., it didn't hit the 200ms
+		# limit, spit it out to the user anyway. It's probably a really
+		# fast blitz game or something, and it's good to show the moves
+		# as they come in even without great analysis.)
 		$pos_calculating->{'white_clock'} = $pos->{'white_clock'};
 		$pos_calculating->{'black_clock'} = $pos->{'black_clock'};
 		delete $pos_calculating->{'white_clock_target'};
 		delete $pos_calculating->{'black_clock_target'};
-		output_json(1);
+
+		if (defined($pos_calculating_started)) {
+			output_json(0);
+		} else {
+			output_json(1);
+		}
+		$pos_calculating_started = [Time::HiRes::gettimeofday];
+		$pos_pv_started = undef;
 
 		# Ask the engine to stop; we will throw away its data until it
 		# sends us "bestmove", signaling the end of it.
@@ -411,6 +341,8 @@ sub handle_position {
 	uciprint($engine, "position fen " . $pos->fen());
 	uciprint($engine, "go infinite");
 	$pos_calculating = $pos;
+	$pos_calculating_started = [Time::HiRes::gettimeofday];
+	$pos_pv_started = undef;
 
 	if (defined($engine2)) {
 		if (defined($pos_calculating_second_engine)) {
@@ -429,19 +361,6 @@ sub handle_position {
 
 	$engine->{'info'} = {};
 	$last_move = time;
-
-	schedule_tb_lookup();
-
-	# 
-	# Output a command every move to note that we're
-	# still paying attention -- this is a good tradeoff,
-	# since if no move has happened in the last half
-	# hour, the analysis/relay has most likely stopped
-	# and we should stop hogging server resources.
-	#
-	if (defined($t)) {
-		$t->cmd("date");
-	}
 }
 
 sub parse_infos {
@@ -484,6 +403,7 @@ sub parse_infos {
 
 			delete $info->{'score_cp' . $mpv};
 			delete $info->{'score_mate' . $mpv};
+			delete $info->{'splicepos' . $mpv};
 
 			while ($x[0] eq 'cp' || $x[0] eq 'mate') {
 				if ($x[0] eq 'cp') {
@@ -579,8 +499,11 @@ sub complete_using_tbprobe {
 	my @pv = @{$info->{'pv' . $mpv}};
 	my $key = $pos->fen() . " " . join('', @pv);
 	my @moves = ();
+	my $splicepos;
 	if (exists($tbprobe_cache{$key})) {
-		@moves = @{$tbprobe_cache{$key}};
+		my $c = $tbprobe_cache{$key};
+		@moves = @{$c->{'moves'}};
+		$splicepos = $c->{'splicepos'};
 	} else {
 		if ($mpv ne '') {
 			# Force doing at least one move of the PV.
@@ -598,13 +521,13 @@ sub complete_using_tbprobe {
 		return if ($pos->num_pieces() > 7);
 
 		my $fen = $pos->fen();
-		my $pgn_text = `fathom --path=/srv/syzygy "$fen"`;
+		my $pgn_text = `$remoteglotconf::fathom_cmdline "$fen"`;
 		my $pgn = Chess::PGN::Parse->new(undef, $pgn_text);
 		return if (!defined($pgn) || !$pgn->read_game() || ($pgn->result ne '0-1' && $pgn->result ne '1-0'));
 		$pgn->quick_parse_game;
-		$info->{'pv' . $mpv} = \@moves;
 
 		# Splice the PV from the tablebase onto what we have so far.
+		$splicepos = scalar @moves;
 		for my $move (@{$pgn->moves}) {
 			last if $move eq '#';
 			last if $move eq '1-0';
@@ -615,7 +538,10 @@ sub complete_using_tbprobe {
 			push @moves, $uci_move;
 		}
 
-		$tbprobe_cache{$key} = \@moves;
+		$tbprobe_cache{$key} = {
+			moves => \@moves,
+			splicepos => $splicepos
+		};
 	}
 
 	$info->{'pv' . $mpv} = \@moves;
@@ -626,6 +552,7 @@ sub complete_using_tbprobe {
 	} else {
 		$info->{'score_mate' . $mpv} = $matelen;
 	}
+	$info->{'splicepos' . $mpv} = $splicepos;
 }
 
 sub output {
@@ -633,55 +560,32 @@ sub output {
 
 	return if (!defined($pos_calculating));
 
-	# Don't update too often.
-	my $age = Time::HiRes::tv_interval($latest_update);
-	if ($age < $remoteglotconf::update_max_interval) {
-		my $wait = $remoteglotconf::update_max_interval + 0.01 - $age;
-		$output_timer = AnyEvent->timer(after => $wait, cb => \&output);
-		return;
-	}
-	
 	my $info = $engine->{'info'};
 
-	#
-	# If we have tablebase data from a previous lookup, replace the
-	# engine data with the data from the tablebase.
-	#
-	my $fen = $pos_calculating->fen();
-	if (exists($tb_cache{$fen})) {
-		for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
-			delete $info->{$key . '1'};
-			delete $info->{$key};
-		}
-		$info->{'nodes'} = 0;
-		$info->{'nps'} = 0;
-		$info->{'depth'} = 0;
-		$info->{'seldepth'} = 0;
-		$info->{'tbhits'} = 0;
-
-		my $t = $tb_cache{$fen};
-		my $pv = $t->{'pv'};
-		my $matelen = int((1 + $t->{'score'}) / 2);
-		if ($t->{'result'} eq '1/2-1/2') {
-			$info->{'score_cp'} = 0;
-		} elsif ($t->{'result'} eq '1-0') {
-			if ($pos_calculating->{'toplay'} eq 'B') {
-				$info->{'score_mate'} = -$matelen;
-			} else {
-				$info->{'score_mate'} = $matelen;
-			}
-		} else {
-			if ($pos_calculating->{'toplay'} eq 'B') {
-				$info->{'score_mate'} = $matelen;
-			} else {
-				$info->{'score_mate'} = -$matelen;
-			}
+	# Don't update too often.
+	my $wait = $remoteglotconf::update_max_interval - Time::HiRes::tv_interval($latest_update);
+	if (defined($pos_calculating_started)) {
+		my $new_pos_wait = $remoteglotconf::update_force_after_move - Time::HiRes::tv_interval($pos_calculating_started);
+		$wait = $new_pos_wait if ($new_pos_wait < $wait);
+	}
+	if (!$last_output_had_pv && has_pv($info)) {
+		if (!defined($pos_pv_started)) {
+			$pos_pv_started = [Time::HiRes::gettimeofday];
 		}
-		$info->{'pv'} = $pv;
-		$info->{'tablebase'} = 1;
-	} else {
-		$info->{'tablebase'} = 0;
+		# We just got initial PV, and we're in a hurry since we gave out a blank one earlier,
+		# so give us just 200ms more to increase the quality and then force a display.
+		my $new_pos_wait = $remoteglotconf::update_force_after_move - Time::HiRes::tv_interval($pos_pv_started);
+		$wait = $new_pos_wait if ($new_pos_wait < $wait);
+	}
+	if ($wait > 0.0) {
+		$output_timer = AnyEvent->timer(after => $wait + 0.01, cb => \&output);
+		return;
 	}
+	$pos_pv_started = undef;
+	
+	# We're outputting something for this position now, so the special handling
+	# for new positions is off.
+	undef $pos_calculating_started;
 	
 	#
 	# Some programs _always_ report MultiPV, even with only one PV.
@@ -689,7 +593,7 @@ sub output {
 	# specified.
 	#
 	if (exists($info->{'pv1'}) && !exists($info->{'pv2'})) {
-		for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits)) {
+		for my $key (qw(pv score_cp score_mate nodes nps depth seldepth tbhits splicepos)) {
 			if (exists($info->{$key . '1'})) {
 				$info->{$key} = $info->{$key . '1'};
 			} else {
@@ -734,6 +638,14 @@ sub output {
 	output_screen();
 	output_json(0);
 	$latest_update = [Time::HiRes::gettimeofday];
+	$last_output_had_pv = has_pv($info);
+}
+
+sub has_pv {
+	my $info = shift;
+	return 1 if (exists($info->{'pv'}) && (scalar(@{$info->{'pv'}}) > 0));
+	return 1 if (exists($info->{'pv1'}) && (scalar(@{$info->{'pv1'}}) > 0));
+	return 0;
 }
 
 sub output_screen {
@@ -759,6 +671,11 @@ sub output_screen {
 	}
 
 	return unless (exists($pos_calculating->{'board'}));
+
+	my $extra_moves = $pos_calculating->{'extra_moves'};
+	if (defined($extra_moves) && scalar @$extra_moves > 0) {
+		$text .= "  Manual move extensions: " . join(' ', @$extra_moves) . "\n";
+	}
 		
 	if (exists($info->{'pv1'}) && exists($info->{'pv2'})) {
 		# multi-PV
@@ -811,8 +728,6 @@ sub output_screen {
 		$text .= "\n\n";
 	}
 
-	#$text .= book_info($pos_calculating->fen(), $pos_calculating->{'board'}, $pos_calculating->{'toplay'});
-
 	my @refutation_lines = ();
 	if (defined($engine2)) {
 		for (my $mpv = 1; $mpv < 500; ++$mpv) {
@@ -881,7 +796,6 @@ sub output_json {
 		$json->{'move_source_url'} = $remoteglotconf::move_source_url;
 	}
 	$json->{'score'} = score_digest($info, $pos_calculating, '');
-	$json->{'using_lomonosov'} = defined($remoteglotconf::tb_serial_key);
 
 	$json->{'nodes'} = $info->{'nodes'};
 	$json->{'nps'} = $info->{'nps'};
@@ -911,6 +825,9 @@ sub output_json {
 					move => $pretty_move,
 					pv => \@pretty_pv,
 				};
+				if (exists($info->{'splicepos' . $mpv})) {
+					$refutation_lines{$pretty_move}->{'splicepos'} = $info->{'splicepos' . $mpv};
+				}
 			};
 		}
 	}
@@ -1016,7 +933,7 @@ sub output_json {
 	}
 
 	if (exists($pos_calculating->{'history'}) &&
-	    defined($remoteglotconf::json_history_dir)) {
+	    defined($remoteglotconf::json_history_dir) && defined($json->{'engine'}{name})) {
 		my $id = id_for_pos($pos_calculating);
 		my $filename = $remoteglotconf::json_history_dir . "/" . $id . ".json";
 
@@ -1122,7 +1039,24 @@ sub score_digest {
 		if ($pos->{'toplay'} eq 'B') {
 			$mate = -$mate;
 		}
-		return ['m', $mate];
+		if (exists($info->{'splicepos' . $mpv})) {
+			my $sp = $info->{'splicepos' . $mpv};
+			if ($mate > 0) {
+				return ['T', $sp];
+			} else {
+				return ['t', $sp];
+			}
+		} else {
+			if ($mate > 0) {
+				return ['M', $mate];
+			} elsif ($mate < 0) {
+				return ['m', -$mate];
+			} elsif ($pos->{'toplay'} eq 'B') {
+				return ['M', 0];
+			} else {
+				return ['m', 0];
+			}
+		}
 	} else {
 		if (exists($info->{'score_cp' . $mpv})) {
 			my $score = $info->{'score_cp' . $mpv};
@@ -1148,10 +1082,19 @@ sub long_score {
 		if ($pos->{'toplay'} eq 'B') {
 			$mate = -$mate;
 		}
-		if ($mate > 0) {
-			return sprintf "White mates in %u", $mate;
+		if (exists($info->{'splicepos' . $mpv})) {
+			my $sp = $info->{'splicepos' . $mpv};
+			if ($mate > 0) {
+				return sprintf "White wins in %u", int(($sp + 1) * 0.5);
+			} else {
+				return sprintf "Black wins in %u", int(($sp + 1) * 0.5);
+			}
 		} else {
-			return sprintf "Black mates in %u", -$mate;
+			if ($mate > 0) {
+				return sprintf "White mates in %u", $mate;
+			} else {
+				return sprintf "Black mates in %u", -$mate;
+			}
 		}
 	} else {
 		if (exists($info->{'score_cp' . $mpv})) {
@@ -1203,56 +1146,32 @@ sub plot_score {
 	return undef;
 }
 
-my %book_cache = ();
-sub book_info {
-	my ($fen, $board, $toplay) = @_;
-
-	if (exists($book_cache{$fen})) {
-		return $book_cache{$fen};
-	}
-
-	my $ret = `./booklook $fen`;
-	return "" if ($ret =~ /Not found/ || $ret eq '');
-
-	my @moves = ();
-
-	for my $m (split /\n/, $ret) {
-		my ($move, $annotation, $win, $draw, $lose, $rating, $rating_div) = split /,/, $m;
+sub extend_from_manual_override {
+	my ($pos, $moves, $extra_moves) = @_;
 
-		my $pmove;
-		if ($move eq '')  {
-			$pmove = '(current)';
-		} else {
-			($pmove) = prettyprint_pv_no_cache($board, $move);
-			$pmove .= $annotation;
+	my $q = $dbh->prepare('SELECT next_move FROM game_extensions WHERE fen=? AND history=? AND player_w=? AND player_b=? AND (CURRENT_TIMESTAMP - ts) < INTERVAL \'1 hour\'');
+	while (1) {
+		my $player_w = $pos->{'player_w'};
+		my $player_b = $pos->{'player_b'};
+		if ($player_w =~ /^base64:(.*)$/) {
+			$player_w = MIME::Base64::decode_base64($1);
 		}
-
-		my $score;
-		if ($toplay eq 'W') {
-			$score = 1.0 * $win + 0.5 * $draw + 0.0 * $lose;
-		} else {
-			$score = 0.0 * $win + 0.5 * $draw + 1.0 * $lose;
+		if ($player_b =~ /^base64:(.*)$/) {
+			$player_b = MIME::Base64::decode_base64($1);
 		}
-		my $n = $win + $draw + $lose;
-		
-		my $percent;
-		if ($n == 0) {
-			$percent = "     ";
+		#use Data::Dumper; print Dumper([$pos->fen(), JSON::XS::encode_json($moves), $player_w, $player_b]);
+		$q->execute($pos->fen(), JSON::XS::encode_json($moves), $player_w, $player_b);
+		my $ref = $q->fetchrow_hashref;
+		if (defined($ref)) {
+			my $move = $ref->{'next_move'};
+			($pos) = $pos->make_pretty_move($move);
+			push @$moves, $move;
+			push @$extra_moves, $move;
 		} else {
-			$percent = sprintf "%4u%%", int(100.0 * $score / $n + 0.5);
+			last;
 		}
-
-		push @moves, [ $pmove, $n, $percent, $rating ];
 	}
-
-	@moves[1..$#moves] = sort { $b->[2] cmp $a->[2] } @moves[1..$#moves];
-	
-	my $text = "Book moves:\n\n              Perf.     N     Rating\n\n";
-	for my $m (@moves) {
-		$text .= sprintf "  %-10s %s   %6u    %4s\n", $m->[0], $m->[2], $m->[1], $m->[3]
-	}
-
-	return $text;
+	return $pos;
 }
 
 sub extract_clock {
@@ -1316,7 +1235,6 @@ sub find_clock_start {
 		return;
 	}
 
-	# TODO(sesse): Maybe we can get the number of moves somehow else for FICS games.
 	# The history is needed for id_for_pos.
 	if (!exists($pos->{'history'})) {
 		return;
@@ -1373,84 +1291,6 @@ sub find_clock_start {
 	$dbh->commit;
 }
 
-sub schedule_tb_lookup {
-	return if (!defined($remoteglotconf::tb_serial_key));
-	my $pos = $pos_calculating;
-	return if (exists($tb_cache{$pos->fen()}));
-
-	# If there's more than seven pieces, there's not going to be an answer,
-	# so don't bother.
-	return if ($pos->num_pieces() > 7);
-
-	# Max one at a time. If it's still relevant when it returns,
-	# schedule_tb_lookup() will be called again.
-	return if ($tb_lookup_running);
-
-	$tb_lookup_running = 1;
-	my $url = 'http://tb7-api.chessok.com:6904/tasks/addtask?auth.login=' .
-		$remoteglotconf::tb_serial_key .
-		'&auth.password=aquarium&type=0&fen=' . 
-		URI::Escape::uri_escape($pos->fen());
-	print TBLOG "Downloading $url...\n";
-	AnyEvent::HTTP::http_get($url, sub {
-		handle_tb_lookup_return(@_, $pos, $pos->fen());
-	});
-}
-
-sub handle_tb_lookup_return {
-	my ($body, $header, $pos, $fen) = @_;
-	print TBLOG "Response for [$fen]:\n";
-	print TBLOG $header . "\n\n";
-	print TBLOG $body . "\n\n";
-	eval {
-		my $response = JSON::XS::decode_json($body);
-		if ($response->{'ErrorCode'} != 0) {
-			die "Unknown tablebase server error: " . $response->{'ErrorDesc'};
-		}
-		my $state = $response->{'Response'}{'StateString'};
-		if ($state eq 'COMPLETE') {
-			my $pgn = Chess::PGN::Parse->new(undef, $response->{'Response'}{'Moves'});
-			if (!defined($pgn) || !$pgn->read_game()) {
-				warn "Error in parsing PGN\n";
-			} else {
-				$pgn->quick_parse_game;
-				my $pvpos = $pos;
-				my $moves = $pgn->moves;
-				my @uci_moves = ();
-				for my $move (@$moves) {
-					my $uci_move;
-					($pvpos, $uci_move) = $pvpos->make_pretty_move($move);
-					push @uci_moves, $uci_move;
-				}
-				$tb_cache{$fen} = {
-					result => $pgn->result,
-					pv => \@uci_moves,
-					score => $response->{'Response'}{'Score'},
-				};
-				output();
-			}
-		} elsif ($state =~ /QUEUED/ || $state =~ /PROCESSING/) {
-			# Try again in a second. Note that if we have changed
-			# position in the meantime, we might query a completely
-			# different position! But that's fine.
-		} else {
-			die "Unknown response state " . $state;
-		}
-
-		# Wait a second before we schedule another one.
-		$tb_retry_timer = AnyEvent->timer(after => 1.0, cb => sub {
-			$tb_lookup_running = 0;
-			schedule_tb_lookup();
-		});
-	};
-	if ($@) {
-		warn "Error in tablebase lookup: $@";
-
-		# Don't try this one again, but don't block new lookups either.
-		$tb_lookup_running = 0;
-	}
-}
-
 sub open_engine {
 	my ($cmdline, $tag, $cb) = @_;
 	return undef if (!defined($cmdline));
diff --git a/server/hash-lookup.js b/server/hash-lookup.js
index 7d7daeb..e84974c 100644
--- a/server/hash-lookup.js
+++ b/server/hash-lookup.js
@@ -1,10 +1,133 @@
-var grpc = require('grpc');
-var Chess = require('../www/js/chess.js').Chess;
+var grpc = require('@grpc/grpc-js');
 
 var PROTO_PATH = __dirname + '/hashprobe.proto';
-var hashprobe_proto = grpc.load(PROTO_PATH).hashprobe;
+var protoLoader = require('@grpc/proto-loader');
+var packageDefinition = protoLoader.loadSync(
+    PROTO_PATH,
+    {keepCase: true,
+     longs: String,
+     enums: String,
+     defaults: true,
+     oneofs: true
+    });
+var hashprobe_proto = grpc.loadPackageDefinition(packageDefinition).hashprobe;
 
-var board = new Chess();
+/*
+ * validate_fen() is taken from chess.js, which has this license:
+ *
+ * Copyright (c) 2017, Jeff Hlywa (jhlywa@gmail.com)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *----------------------------------------------------------------------------*/
+function validate_fen(fen) {
+  var errors = {
+     0: 'No errors.',
+     1: 'FEN string must contain six space-delimited fields.',
+     2: '6th field (move number) must be a positive integer.',
+     3: '5th field (half move counter) must be a non-negative integer.',
+     4: '4th field (en-passant square) is invalid.',
+     5: '3rd field (castling availability) is invalid.',
+     6: '2nd field (side to move) is invalid.',
+     7: '1st field (piece positions) does not contain 8 \'/\'-delimited rows.',
+     8: '1st field (piece positions) is invalid [consecutive numbers].',
+     9: '1st field (piece positions) is invalid [invalid piece].',
+    10: '1st field (piece positions) is invalid [row too large].',
+    11: 'Illegal en-passant square',
+  };
+
+  /* 1st criterion: 6 space-seperated fields? */
+  var tokens = fen.split(/\s+/);
+  if (tokens.length !== 6) {
+    return {valid: false, error_number: 1, error: errors[1]};
+  }
+
+  /* 2nd criterion: move number field is a integer value > 0? */
+  if (isNaN(tokens[5]) || (parseInt(tokens[5], 10) <= 0)) {
+    return {valid: false, error_number: 2, error: errors[2]};
+  }
+
+  /* 3rd criterion: half move counter is an integer >= 0? */
+  if (isNaN(tokens[4]) || (parseInt(tokens[4], 10) < 0)) {
+    return {valid: false, error_number: 3, error: errors[3]};
+  }
+
+  /* 4th criterion: 4th field is a valid e.p.-string? */
+  if (!/^(-|[abcdefgh][36])$/.test(tokens[3])) {
+    return {valid: false, error_number: 4, error: errors[4]};
+  }
+
+  /* 5th criterion: 3th field is a valid castle-string? */
+  if( !/^[C-HK]?[A-FQ]?[c-hk]?[a-fq]?$/.test(tokens[2]) &&
+      tokens[2] !== '-') {
+    return {valid: false, error_number: 5, error: errors[5]};
+  }
+
+  /* 6th criterion: 2nd field is "w" (white) or "b" (black)? */
+  if (!/^(w|b)$/.test(tokens[1])) {
+    return {valid: false, error_number: 6, error: errors[6]};
+  }
+
+  /* 7th criterion: 1st field contains 8 rows? */
+  var rows = tokens[0].split('/');
+  if (rows.length !== 8) {
+    return {valid: false, error_number: 7, error: errors[7]};
+  }
+
+  /* 8th criterion: every row is valid? */
+  for (var i = 0; i < rows.length; i++) {
+    /* check for right sum of fields AND not two numbers in succession */
+    var sum_fields = 0;
+    var previous_was_number = false;
+
+    for (var k = 0; k < rows[i].length; k++) {
+      if (!isNaN(rows[i][k])) {
+        if (previous_was_number) {
+          return {valid: false, error_number: 8, error: errors[8]};
+        }
+        sum_fields += parseInt(rows[i][k], 10);
+        previous_was_number = true;
+      } else {
+        if (!/^[prnbqkPRNBQK]$/.test(rows[i][k])) {
+          return {valid: false, error_number: 9, error: errors[9]};
+        }
+        sum_fields += 1;
+        previous_was_number = false;
+      }
+    }
+    if (sum_fields !== 8) {
+      return {valid: false, error_number: 10, error: errors[10]};
+    }
+  }
+
+  if ((tokens[3][1] == '3' && tokens[1] == 'w') ||
+      (tokens[3][1] == '6' && tokens[1] == 'b')) {
+        return {valid: false, error_number: 11, error: errors[11]};
+  }
+
+  /* everything's okay! */
+  return {valid: true, error_number: 0, error: errors[0]};
+}
 
 var clients = [];
 var current_servers = [];
@@ -32,7 +155,7 @@ var init = function(servers) {
 exports.init = init;
 
 var handle_request = function(fen, response) {
-	if (fen === undefined || fen === null || fen === '' || !board.validate_fen(fen).valid) {
+	if (fen === undefined || fen === null || fen === '' || !validate_fen(fen).valid) {
 		response.writeHead(400, {});
 		response.end();
 		return;
@@ -68,11 +191,11 @@ var handle_response = function(fen, response, probe_responses) {
 	var probe_response = reconcile_responses(probe_responses);
 	var lines = {};
 
-	var root = translate_line(board, fen, probe_response['root']);
+	var root = translate_line(fen, probe_response['root']);
 	for (var i = 0; i < probe_response['line'].length; ++i) {
 		var line = probe_response['line'][i];
 		var pretty_move = line['move']['pretty'];
-		lines[pretty_move] = translate_line(board, fen, line);
+		lines[pretty_move] = translate_line(fen, line);
 	}
 
 	var text = JSON.stringify({
@@ -141,7 +264,7 @@ var reconcile_moves = function(a, b) {
 	}
 }	
 
-var translate_line = function(board, fen, line) {
+var translate_line = function(fen, line) {
 	var r = {};
 
 	if (line['move'] && line['move']['pretty']) {
diff --git a/server/serve-analysis.js b/server/serve-analysis.js
index 86f2d90..8448cfa 100644
--- a/server/serve-analysis.js
+++ b/server/serve-analysis.js
@@ -23,9 +23,11 @@ var json_filename = '/srv/analysis.sesse.net/www/analysis.json';
 if (process.argv.length >= 3) {
 	json_filename = process.argv[2];
 }
+var html_filename = '/srv/analysis.sesse.net/www/index.html';
 
 // Expected destination filenames.
 var serve_url = '/analysis.pl';
+var html_serve_url = '/index-inline.html';
 var hash_serve_url = '/hash';
 if (process.argv.length >= 4) {
 	serve_url = process.argv[3];
@@ -53,6 +55,7 @@ var json_lock = 0;
 
 // The current contents of the file to hand out, and its last modified time.
 var json = undefined;
+var html = undefined;
 
 // The last five timestamps, and diffs from them to the latest version.
 var historic_json = [];
@@ -134,6 +137,17 @@ var create_json_historic_diff = function(new_json, history_left, new_diff_json,
 	var histobj = history_left.shift();
 	var diff = delta.JSON_delta.diff(histobj.parsed, new_json.parsed);
 	var diff_text = JSON.stringify(diff);
+
+	// Verify that the delta is correct
+	var base = JSON.parse(histobj.plain);
+	delta.JSON_delta.patch(base, diff);
+	var correct_pv = JSON.stringify(base['pv']);
+	var wrong_pv = JSON.stringify(new_json.parsed['pv']);
+	if (correct_pv !== wrong_pv) {
+		console.log("Patch went wrong:", histobj.plain, new_json.plain);
+		exit();
+	}
+
 	zlib.gzip(diff_text, function(err, buffer) {
 		if (err) throw err;
 		new_diff_json[histobj.last_modified] = {
@@ -146,6 +160,23 @@ var create_json_historic_diff = function(new_json, history_left, new_diff_json,
 	});
 }
 
+function read_entire_file(filename, callback) {
+	fs.open(filename, 'r', function(err, fd) {
+		if (err) throw err;
+		fs.fstat(fd, function(err, st) {
+			if (err) throw err;
+			var buffer = new Buffer(1048576);
+			fs.read(fd, buffer, 0, 1048576, 0, function(err, bytesRead, buffer) {
+				if (err) throw err;
+				fs.close(fd, function() {
+					var contents = buffer.toString('utf8', 0, bytesRead);
+					callback(contents, st.mtime.getTime());
+				});
+			});
+		});
+	});
+}
+
 var reread_file = function(event, filename) {
 	if (filename != path.basename(json_filename)) {
 		return;
@@ -162,17 +193,34 @@ var reread_file = function(event, filename) {
 	json_lock = 1;
 
 	console.log("Rereading " + json_filename);
-	fs.open(json_filename, 'r', function(err, fd) {
-		if (err) throw err;
-		fs.fstat(fd, function(err, st) {
-			if (err) throw err;
-			var buffer = new Buffer(1048576);
-			fs.read(fd, buffer, 0, 1048576, 0, function(err, bytesRead, buffer) {
+	read_entire_file(json_filename, function(new_json_contents, mtime) {
+		replace_json(new_json_contents, mtime);
+
+		// The HTML can go async, it's not too hopeless if it's out of date by a few milliseconds
+		read_entire_file(html_filename, function(new_html_contents, html_mtime) {
+			var json_headers = {
+				'X-RGLM': mtime,
+				'X-RGNV': count_viewers(),  // May be slightly out of date.
+				'Date': (new Date).toUTCString(),
+			};
+			if (MINIMUM_VERSION) {
+				json_headers['X-RGMV'] = MINIMUM_VERSION;
+			}
+			let inline_json = {
+				'data': JSON.parse(new_json_contents),
+				'headers': json_headers,
+			};
+			delete inline_json['data']['internal'];
+
+			new_html_contents = new_html_contents.replace(
+				'/*REPLACE:inlinejson*/',
+				'window.inline_json=' + JSON.stringify(inline_json) + ';');
+			zlib.gzip(new_html_contents, function(err, buffer) {
 				if (err) throw err;
-				fs.close(fd, function() {
-					var new_json_contents = buffer.toString('utf8', 0, bytesRead);
-					replace_json(new_json_contents, st.mtime.getTime());
-				});
+				html = {
+					plain: new_html_contents,
+					gzip: buffer,
+				};
 			});
 		});
 	});
@@ -231,6 +279,24 @@ var send_json = function(response, ims, accept_gzip, num_viewers) {
 	}
 	response.end();
 }
+var send_html = function(response, accept_gzip, num_viewers) {
+	var headers = {
+		'Content-type': 'text/html; charset=utf-8',
+		'Vary': 'Accept-Encoding',
+	};
+
+	if (accept_gzip) {
+		headers['Content-Length'] = html.gzip.length;
+		headers['Content-Encoding'] = 'gzip';
+		response.writeHead(200, headers);
+		response.write(html.gzip);
+	} else {
+		headers['Content-Length'] = html.plain.length;
+		response.writeHead(200, headers);
+		response.write(html.plain);
+	}
+	response.end();
+}
 var mark_recently_seen = function(unique) {
 	if (unique) {
 		last_seen_clients[unique] = (new Date).getTime();
@@ -277,7 +343,7 @@ if (COUNT_FROM_VARNISH_LOG) {
 	// Note: We abuse serve_url as a regex.
 	var varnishncsa = child_process.spawn(
 		'varnishncsa', ['-F', '%{%s}t %U %q tffb=%{Varnish:time_firstbyte}x',
-		'-q', 'ReqURL ~ "^' + serve_url + '"']);
+		'-q', 'ReqURL ~ "^(' + serve_url + '|' + html_serve_url + ')"']);
 	var rl = readline.createInterface({
 		input: varnishncsa.stdout,
 		output: varnishncsa.stdin,
@@ -348,22 +414,22 @@ server.on('request', function(request, response) {
 		hash_lookup.handle_request(fen, response);
 		return;
 	}
-	if (u.pathname !== serve_url) {
+	if (u.pathname !== serve_url && u.pathname !== html_serve_url) {
 		// This is not the request you are looking for.
 		send_404(response);
 		return;
 	}
 
-	mark_recently_seen(unique);
-
 	var accept_encoding = request.headers['accept-encoding'];
-	var accept_gzip;
-	if (accept_encoding !== undefined && accept_encoding.match(/\bgzip\b/)) {
-		accept_gzip = true;
-	} else {
-		accept_gzip = false;
+	let accept_gzip = (accept_encoding !== undefined && accept_encoding.match(/\bgzip\b/));
+
+	if (u.pathname === html_serve_url) {
+		send_html(response, accept_gzip, count_viewers());
+		return;
 	}
 
+	mark_recently_seen(unique);
+
 	// If we already have something newer than what the user has,
 	// just send it out and be done with it.
 	if (json !== undefined && (!ims || json.last_modified > ims)) {
diff --git a/www/analysis.pl b/www/analysis.pl
old mode 100755
new mode 100644
diff --git a/www/css/chessboard-0.3.0.css b/www/css/chessboard-0.3.0.css
index e987b52..557f283 100644
--- a/www/css/chessboard-0.3.0.css
+++ b/www/css/chessboard-0.3.0.css
@@ -1,70 +1,67 @@
-/*!
- * chessboard.js v0.3.0
- *
- * Copyright 2013 Chris Oakman
- * Released under the MIT license
- * https://github.com/oakmac/chessboardjs/blob/master/LICENSE
- *
- * Date: 10 Aug 2013
- */
-
-/* clearfix */
-.clearfix-7da63 {
-  clear: both;
-}
-
-/* board */
-.board-b72b1 {
-  border: 2px solid #404040;
-  -moz-box-sizing: content-box;
-  box-sizing: content-box;
-}
-
-/* square */
-.square-55d63 {
-  float: left;
-  position: relative;
-
-  /* disable any native browser highlighting */
-  -webkit-touch-callout: none;
-    -webkit-user-select: none;
-     -khtml-user-select: none;
-       -moz-user-select: none;
-        -ms-user-select: none;
-            user-select: none;
-}
-
-/* white square */
-.white-1e1d7 {
-  background-color: #f0d9b5;
-  color: #b58863;
-}
-
-/* black square */
-.black-3c85d {
-  background-color: #b58863;
-  color: #f0d9b5;
-}
-
-/* highlighted square */
-.highlight1-32417, .highlight2-9c5d2 {
-  -webkit-box-shadow: inset 0 0 3px 3px yellow;
-  -moz-box-shadow: inset 0 0 3px 3px yellow;
-  box-shadow: inset 0 0 3px 3px yellow;
-}
-
-/* notation */
-.notation-322f9 {
-  cursor: default;
-  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-  font-size: 14px;
-  position: absolute;
-}
-.alpha-d2270 {
-  bottom: 1px;
-  right: 3px;
-}
-.numeric-fc462 {
-  top: 2px;
-  left: 2px;
-}
\ No newline at end of file
+/*
+ * chessboard.js v0.3.0+asn
+ *
+ * Copyright 2013 Chris Oakman
+ * Portions copyright 2022 Steinar H. Gunderson
+ * Released under the MIT license
+ * https://github.com/oakmac/chessboardjs/blob/master/LICENSE
+ *
+ * Date: 10 Aug 2013
+ */
+
+/* board */
+.board-b72b1 {
+  outline: 2px solid #404040;
+  display: grid;
+  grid-template-rows: repeat(8, 12.5%);
+  grid-template-columns: repeat(8, 12.5%);
+  grid-gap: 0px;
+  width: 100%;
+  aspect-ratio: 1;
+}
+
+/* square */
+.square-55d63 {
+  /* disable any native browser highlighting */
+  user-select: none;
+}
+
+/* white square */
+.white-1e1d7 {
+  background-color: #f0d9b5;
+  color: #b58863;
+}
+
+/* black square */
+.black-3c85d {
+  background-color: #b58863;
+  color: #f0d9b5;
+}
+
+/* highlighted square */
+.highlight1-32417, .highlight2-9c5d2 {
+  box-shadow: inset 0 0 3px 3px yellow;
+}
+
+/* notation */
+.alpha-d2270, .numeric-fc462 {
+  cursor: default;
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+  font-size: 14px;
+  position: absolute;
+}
+.alpha-d2270 {
+  bottom: 1px;
+  right: 3px;
+}
+.numeric-fc462 {
+  top: 2px;
+  left: 2px;
+}
+
+.piece-417db {
+  transform: translate(0,0);  /* Force a new stacking context for SVG pieces. */
+  position: absolute;
+  width: 12.5%;
+  height: 12.5%;
+}
diff --git a/www/css/chessboard-0.3.0.min.css b/www/css/chessboard-0.3.0.min.css
deleted file mode 100644
index 52781a9..0000000
--- a/www/css/chessboard-0.3.0.min.css
+++ /dev/null
@@ -1,2 +0,0 @@
-/*! chessboard.js v0.3.0 | (c) 2013 Chris Oakman | MIT License chessboardjs.com/license */
-.clearfix-7da63{clear:both}.board-b72b1{border:2px solid #404040;-moz-box-sizing:content-box;box-sizing:content-box}.square-55d63{float:left;position:relative;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.white-1e1d7{background-color:#f0d9b5;color:#b58863}.black-3c85d{background-color:#b58863;color:#f0d9b5}.highlight1-32417,.highlight2-9c5d2{-webkit-box-shadow:inset 0 0 3px 3px yellow;-moz-box-shadow:inset 0 0 3px 3px yellow;box-shadow:inset 0 0 3px 3px yellow}.notation-322f9{cursor:default;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:14px;position:absolute}.alpha-d2270{bottom:1px;right:3px}.numeric-fc462{top:2px;left:2px}
\ No newline at end of file
diff --git a/www/css/remoteglot.css b/www/css/remoteglot.css
index 09b6b08..a2e221f 100644
--- a/www/css/remoteglot.css
+++ b/www/css/remoteglot.css
@@ -1,5 +1,8 @@
-body {
+html {
+	color-scheme: light dark;
 	font-family: sans-serif;
+	background: white;
+	color: black;
 }
 h1 {
 	margin-top: 0em;
@@ -11,42 +14,41 @@ h3 {
 #scorecontainer {
 	font-size: x-large;
 	margin-top: 0;
+	display: grid;
+	grid-template-columns: max-content 1fr;
+	gap: 12px;
 }
 #score {
-	float: left;
+	grid-column: 1;
 }
 #scoresparkcontainer {
+	grid-column: 2;
 	overflow: hidden;
+	height: 0.85em;
+	margin-top: 0.15em;
+	width: 100%;
 }
-#scorespark {
-	margin-left: 0.5em;
-	margin-right: 0.5em;
+#sparklinehover {
+	position: absolute;
+	display: none;
+	background-color: rgba(0, 0, 0, 0.6);
+	color: white;
+	font-size: 10px;
+	white-space: nowrap;
+	padding: 5px;
+	border: 1px solid white;
+	z-index: 10000;
 }
 #pvcontainer {
 	clear: left;
 	margin-top: 1em;
 }
-.window {
-	position: absolute;    
-	width: 0px;
-	height: 0px;
-	opacity: 0.0; 
-}
 .c1 {
 	opacity: 0.75;
 }
-.l1arrow {
-	opacity: 1.0;
-}
 .hidden {
 	display: none;
 }
-.vir path {
-	opacity: 0.0;
-}
-.vir path.l1arrow {
-	opacity: 1.0;
-}
 #news {
 	font-size: smaller;
 }
@@ -96,13 +98,14 @@ p {
 	display: block;
 	width: 100%;
 	padding: 0;
+	transform: translate(0,0);  /* Make it a containing block. */
 }
 #hiddenboard {
 	display: none;
 }
 #bottompanel {
 	display: block;
-	width: 100%;
+	width: calc(100% + 4px);
 	font-size: smaller;
 	margin-top: 0.5em;
 	margin-bottom: 0;
@@ -178,9 +181,6 @@ a.move:hover {
 #linenav {
 	display: none;
 }
-#lomonosov {
-	display: none;
-}
 
 #games {
 	font-size: smaller;
@@ -195,3 +195,44 @@ a.move:hover {
 .game:last-of-type {
 	border-right: none;
 }
+
+.pv, #pv, #history {  /* Mute move colors a bit. */
+	color: #555;
+}
+
+.imbalance-inverted-piece {
+	display: none;
+	filter: invert(1);
+}
+
+.imbalance-piece, .imbalance-inverted-piece {
+	width: 15px;
+	height: 15px;
+}
+
+@media (prefers-color-scheme: dark) {
+
+:root {
+	background: black;
+	color: #eee;
+}
+.pv, #pv, #history {  /* Mute move colors a bit. */
+	color: #bbb;
+}
+#numviewers {
+	color: #bbb;
+}
+a.move, a.move:link {
+	color: #eee;
+}
+a:link {
+	color: rgb(128,128,238);
+}
+.imbalance-piece {
+	display: none;
+}
+.imbalance-inverted-piece {
+	display: initial;
+}
+
+}
diff --git a/www/favicon.ico b/www/favicon.ico
index e4e22dd..0148840 100644
Binary files a/www/favicon.ico and b/www/favicon.ico differ
diff --git a/www/index.html b/www/index.dev.html
similarity index 71%
rename from www/index.html
rename to www/index.dev.html
index b6d9e8b..a44ec13 100644
--- a/www/index.html
+++ b/www/index.dev.html
@@ -2,14 +2,23 @@
 <html>
 <head>
   <meta charset="utf-8" />
-  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
   <title>analysis.sesse.net</title>
-
-  <link rel="stylesheet" href="css/chessboard-0.3.0.min.css" />
-  <link rel="stylesheet" href="css/remoteglot.css" />
   <meta name="viewport" content="width=device-width, initial-scale=1" />
+  <!-- replace <style>[chomp;css/remoteglot.min.css]</style> -->
+  <link rel="stylesheet" href="css/chessboard-0.3.0.css" />
+  <link rel="stylesheet" href="css/remoteglot.css" />
+  <!-- end replace -->
+  <!-- replace <link rel="shortcut icon" href="data:image/png;base64,[base64;favicon.ico]" type="image/png"> -->
+  <!-- end replace -->
+
+  <!-- replace <script>/*REPLACE:inlinejson*/[js/remoteglot.min.js]</script> -->
+  <script type="text/javascript" src="js/chessboard-0.3.0.js"></script>
+  <script type="text/javascript" src="js/chess.js"></script>
+  <script type="text/javascript" src="js/json_delta.js"></script>
+  <script type="text/javascript" src="js/remoteglot.js"></script>
+  <!-- end replace -->
 </head>
-<body>
+<body style="opacity: 0">  <!-- Avoid layout shift on initial load. -->
 <audio id="ding" preload="none">
   <source src="ding.opus" type="audio/ogg; codecs=opus" />
   <source src="ding.mp3" type="audio/mp3" />
@@ -28,9 +37,9 @@
 <div id="analysis">
   <div id="scorecontainer">
     <span id="score">Score:</span>
-    <div id="scoresparkcontainer">
-      <span id="scorespark"></span>
-    </div>
+    <svg xmlns="http://www.w3.org/2000/svg" id="scoresparkcontainer">
+    </svg>
+    <div id="sparklinehover"></div>
   </div>
   <p id="pvcontainer"><strong id="pvtitle">PV:</strong> <span id="pv"></span></p>
   <p id="searchstats"></p>
@@ -52,7 +61,9 @@
 </div>
 <h2 style="clear: both;">Symbol explanation</h2>
 <ul>
-  <li><strong>Score:</strong> 1.00 is the value of one pawn (in a balanced endgame). Positive values are better for white.</li>
+  <li><strong>Score:</strong> 1.00 is roughly one pawn
+   (<a href="https://github.com/official-stockfish/Stockfish/commit/ad2aa8c06f438de8b8bb7b7c8726430e3f2a5685">technically</a>,
+   50% win probability for a computer). Positive values are better for white.</li>
   <li><strong>PV:</strong> Principal Variation, the series of moves the engine thinks is the best.</li>
   <li><strong>Thick red line:</strong> Marks the best move (in the view of the engine). Multiple chained arrows
     means that the PV starts with multiple successive moves with the same piece, ie., the engine thinks
@@ -65,29 +76,14 @@
     is forced or nearly so.</li>
 </ul>
 <p id="credits"><a href="http://git.sesse.net/?p=remoteglot;a=summary">remoteglot</a>
-  &copy; 2007&ndash;2018 <a href="http://www.sesse.net/">Steinar H. Gunderson</a>.
+  &copy; 2007&ndash;2023 <a href="http://www.sesse.net/">Steinar H. Gunderson</a>.
   Chess analysis by <a href="http://stockfishchess.org/" id="engineid">Stockfish</a><span id="enginedetails"></span>.
   <span id="movesource"></span>
   Hosting and additional analysis hardware by <a href="http://www.samfundet.no/">Studentersamfundet i Trondhjem</a>
   and Berge Schwebs Bjørlo.
-  JavaScript chessboard powered by <a href="http://chessboardjs.com/">chessboard.js</a>
+  Chessboard powered by <a href="http://chessboardjs.com/">chessboard.js</a>
   and <a href="https://github.com/jhlywa/chess.js">chess.js</a>.
   Ding sound by <a href="https://www.freesound.org/people/Aiwha/sounds/196106/">Aiwha</a> (CC-BY-3.0).
-  <span id="lomonosov">7-man Lomonosov tablebase lookup by <a href="http://tb7.chessok.com/">ChessOK</a>.</span></p>
-
-<!-- For faster development -->
-<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
-<script type="text/javascript" src="js/chessboard-0.3.0.min.js"></script>
-<script type="text/javascript" src="js/chess.js"></script>
-<script type="text/javascript" src="js/json_delta.js"></script>
-<script type="text/javascript" src="js/jquery.sparkline.js"></script>
-<script type="text/javascript" src="js/remoteglot.js"></script>
-<!--
--->
-
-<!-- Minified version of the previous six, compiled together -->
-<!--
-<script type="text/javascript" src="js/remoteglot.min.js"></script>
--->
+  </p>
 </body>
 </html>
diff --git a/www/js/chess.js b/www/js/chess.js
index f274628..4598758 100644
--- a/www/js/chess.js
+++ b/www/js/chess.js
@@ -68,44 +68,6 @@ var Chess = function(fen) {
     k: [-17, -16, -15,   1,  17, 16, 15,  -1]
   };
 
-  var ATTACKS = [
-    20, 0, 0, 0, 0, 0, 0, 24,  0, 0, 0, 0, 0, 0,20, 0,
-     0,20, 0, 0, 0, 0, 0, 24,  0, 0, 0, 0, 0,20, 0, 0,
-     0, 0,20, 0, 0, 0, 0, 24,  0, 0, 0, 0,20, 0, 0, 0,
-     0, 0, 0,20, 0, 0, 0, 24,  0, 0, 0,20, 0, 0, 0, 0,
-     0, 0, 0, 0,20, 0, 0, 24,  0, 0,20, 0, 0, 0, 0, 0,
-     0, 0, 0, 0, 0,20, 2, 24,  2,20, 0, 0, 0, 0, 0, 0,
-     0, 0, 0, 0, 0, 2,53, 56, 53, 2, 0, 0, 0, 0, 0, 0,
-    24,24,24,24,24,24,56,  0, 56,24,24,24,24,24,24, 0,
-     0, 0, 0, 0, 0, 2,53, 56, 53, 2, 0, 0, 0, 0, 0, 0,
-     0, 0, 0, 0, 0,20, 2, 24,  2,20, 0, 0, 0, 0, 0, 0,
-     0, 0, 0, 0,20, 0, 0, 24,  0, 0,20, 0, 0, 0, 0, 0,
-     0, 0, 0,20, 0, 0, 0, 24,  0, 0, 0,20, 0, 0, 0, 0,
-     0, 0,20, 0, 0, 0, 0, 24,  0, 0, 0, 0,20, 0, 0, 0,
-     0,20, 0, 0, 0, 0, 0, 24,  0, 0, 0, 0, 0,20, 0, 0,
-    20, 0, 0, 0, 0, 0, 0, 24,  0, 0, 0, 0, 0, 0,20
-  ];
-
-  var RAYS = [
-     17,  0,  0,  0,  0,  0,  0, 16,  0,  0,  0,  0,  0,  0, 15, 0,
-      0, 17,  0,  0,  0,  0,  0, 16,  0,  0,  0,  0,  0, 15,  0, 0,
-      0,  0, 17,  0,  0,  0,  0, 16,  0,  0,  0,  0, 15,  0,  0, 0,
-      0,  0,  0, 17,  0,  0,  0, 16,  0,  0,  0, 15,  0,  0,  0, 0,
-      0,  0,  0,  0, 17,  0,  0, 16,  0,  0, 15,  0,  0,  0,  0, 0,
-      0,  0,  0,  0,  0, 17,  0, 16,  0, 15,  0,  0,  0,  0,  0, 0,
-      0,  0,  0,  0,  0,  0, 17, 16, 15,  0,  0,  0,  0,  0,  0, 0,
-      1,  1,  1,  1,  1,  1,  1,  0, -1, -1,  -1,-1, -1, -1, -1, 0,
-      0,  0,  0,  0,  0,  0,-15,-16,-17,  0,  0,  0,  0,  0,  0, 0,
-      0,  0,  0,  0,  0,-15,  0,-16,  0,-17,  0,  0,  0,  0,  0, 0,
-      0,  0,  0,  0,-15,  0,  0,-16,  0,  0,-17,  0,  0,  0,  0, 0,
-      0,  0,  0,-15,  0,  0,  0,-16,  0,  0,  0,-17,  0,  0,  0, 0,
-      0,  0,-15,  0,  0,  0,  0,-16,  0,  0,  0,  0,-17,  0,  0, 0,
-      0,-15,  0,  0,  0,  0,  0,-16,  0,  0,  0,  0,  0,-17,  0, 0,
-    -15,  0,  0,  0,  0,  0,  0,-16,  0,  0,  0,  0,  0,  0,-17
-  ];
-
-  var SHIFTS = { p: 0, n: 1, b: 2, r: 3, q: 4, k: 5 };
-
   var FLAGS = {
     NORMAL: 'n',
     CAPTURE: 'c',
@@ -166,11 +128,7 @@ var Chess = function(fen) {
     load(fen);
   }
 
-  function clear(keep_headers) {
-    if (typeof keep_headers === 'undefined') {
-      keep_headers = false;
-    }
-
+  function clear() {
     board = new Array(128);
     kings = {w: EMPTY, b: EMPTY};
     turn = WHITE;
@@ -179,7 +137,7 @@ var Chess = function(fen) {
     half_moves = 0;
     move_number = 1;
     history = [];
-    if (!keep_headers) header = {};
+    header = {};
     update_setup(generate_fen());
   }
 
@@ -187,11 +145,7 @@ var Chess = function(fen) {
     load(DEFAULT_POSITION);
   }
 
-  function load(fen, keep_headers) {
-    if (typeof keep_headers === 'undefined') {
-      keep_headers = false;
-    }
-
+  function load(fen) {
     var tokens = fen.split(/\s+/);
     var position = tokens[0];
     var square = 0;
@@ -200,7 +154,7 @@ var Chess = function(fen) {
       return false;
     }
 
-    clear(keep_headers);
+    clear();
 
     for (var i = 0; i < position.length; i++) {
       var piece = position.charAt(i);
@@ -708,6 +662,10 @@ var Chess = function(fen) {
       }
     }
 
+    return possibly_filter_moves(moves, us, legal);
+  }
+
+  function possibly_filter_moves(moves, us, legal) {
     /* return all pseudo-legal moves (this includes moves that allow the king
      * to be captured)
      */
@@ -820,40 +778,71 @@ var Chess = function(fen) {
   }
 
   function attacked(color, square) {
-    for (var i = SQUARES.a8; i <= SQUARES.h1; i++) {
-      /* did we run off the end of the board */
-      if (i & 0x88) { i += 7; continue; }
+    // Check for attacks by the king.
+    if (Math.abs(rank(kings[color]) - rank(square)) <= 1 &&
+        Math.abs(file(kings[color]) - file(square)) <= 1) {
+      return true;
+    }
 
-      /* if empty square or wrong color */
-      if (board[i] == null || board[i].color !== color) continue;
+    // Check for attacks by knights.
+    for (const offset of PIECE_OFFSETS[KNIGHT]) {
+      let knight_sq = square + offset;
+      if (knight_sq & 0x88) continue;
 
-      var piece = board[i];
-      var difference = i - square;
-      var index = difference + 119;
+      if (board[knight_sq] != null &&
+          board[knight_sq].type === KNIGHT &&
+          board[knight_sq].color === color) {
+        return true;
+      }
+    }
 
-      if (ATTACKS[index] & (1 << SHIFTS[piece.type])) {
-        if (piece.type === PAWN) {
-          if (difference > 0) {
-            if (piece.color === WHITE) return true;
-          } else {
-            if (piece.color === BLACK) return true;
+    // Check for attacks by pawns.
+    const p1sq = square - PAWN_OFFSETS[color][2];
+    const p2sq = square - PAWN_OFFSETS[color][3];
+    if (!(p1sq & 0x88) &&
+        board[p1sq] != null &&
+        board[p1sq].type === PAWN &&
+        board[p1sq].color === color) {
+      return true;
+    }
+    if (!(p2sq & 0x88) &&
+        board[p2sq] != null &&
+        board[p2sq].type === PAWN &&
+        board[p2sq].color === color) {
+      return true;
+    }
+
+    // Check for attacks by rooks (where queens count as rooks).
+    for (const offset of PIECE_OFFSETS[ROOK]) {
+      let rook_sq = square;
+      while (true) {
+        rook_sq += offset;
+        if (rook_sq & 0x88) break;
+
+        if (board[rook_sq] != null) {
+          if ((board[rook_sq].type === ROOK || board[rook_sq].type === QUEEN) &&
+              board[rook_sq].color === color) {
+            return true;
           }
-          continue;
+          break;
         }
+      }
+    }
 
-        /* if the piece is a knight or a king */
-        if (piece.type === 'n' || piece.type === 'k') return true;
-
-        var offset = RAYS[index];
-        var j = i + offset;
+    // And similarly for attacks by bishops (where queens count as bishops).
+    for (const offset of PIECE_OFFSETS[BISHOP]) {
+      let bishop_sq = square;
+      while (true) {
+        bishop_sq += offset;
+        if (bishop_sq & 0x88) break;
 
-        var blocked = false;
-        while (j !== square) {
-          if (board[j] != null) { blocked = true; break; }
-          j += offset;
+        if (board[bishop_sq] != null) {
+          if ((board[bishop_sq].type === BISHOP || board[bishop_sq].type === QUEEN) &&
+              board[bishop_sq].color === color) {
+            return true;
+          }
+          break;
         }
-
-        if (!blocked) return true;
       }
     }
 
@@ -1114,12 +1103,24 @@ var Chess = function(fen) {
 
   /* this function is used to uniquely identify ambiguous moves */
   function get_disambiguator(move, sloppy) {
-    var moves = generate_moves({legal: !sloppy});
-
     var from = move.from;
     var to = move.to;
     var piece = move.piece;
 
+    if (piece === 'p' || piece === 'k') {
+       // Pawn or king moves are never ambiguous.
+       return '';
+    }
+
+    let moves = find_attacking_moves(move.to, piece, move.color);
+    if (moves.length <= 1) {
+       // There can be no ambiguity, so don't bother checking legality
+       // (we assume the move has already been found legal).
+       return '';
+    }
+
+    moves = possibly_filter_moves(moves, move.color, !sloppy);
+
     var ambiguities = 0;
     var same_rank = 0;
     var same_file = 0;
@@ -1167,6 +1168,42 @@ var Chess = function(fen) {
     return '';
   }
 
+  // Find all pseudolegal moves featuring the given piece moving to
+  // the given square (using symmetry of all non-pawn-or-castle moves,
+  // we simply generate moves backwards). Does not support pawns.
+  // Assumes there's not already a piece of our own color
+  // on the destination square.
+  function find_attacking_moves(to, piece, us) {
+    let moves = [];
+
+    function add_move(board, moves, from, to, flags, rook_sq) {
+      moves.push(build_move(board, from, to, flags, undefined, rook_sq));
+    }
+    for (let offset of PIECE_OFFSETS[piece]) {
+      var square = to;
+
+      while (true) {
+        square += offset;
+        if (square & 0x88) break;
+
+        if (board[square] != null) {
+          if (board[square].color !== us || board[square].type !== piece) break;
+          if (board[to] == null) {
+            add_move(board, moves, square, to, BITS.NORMAL);
+          } else {
+            add_move(board, moves, square, to, BITS.CAPTURE);
+          }
+          break;
+        }
+
+        /* break if knight or king */
+        if (piece === 'n' || piece === 'k') break;
+      }
+    }
+
+    return moves;
+  }
+
   function ascii() {
     var s = '   +------------------------+\n';
     for (var i = SQUARES.a8; i <= SQUARES.h1; i++) {
@@ -1214,7 +1251,23 @@ var Chess = function(fen) {
       }
     }
 
-    var moves = generate_moves();
+    let moves;
+    let piece_matches = clean_move.match(/^([NBRQK])x?([a-h][1-8])$/);
+    if (piece_matches) {
+      // Only look for moves by the given piece to the given square.
+      let to = SQUARES[piece_matches[2]];
+      if (board[to] != null && board[to].color === turn) {
+        // Cannot capture our own piece.
+        return null;
+      }
+      moves = find_attacking_moves(to, piece_matches[1].toLowerCase(), turn);
+      // Legal moves only.
+      moves = possibly_filter_moves(moves, turn, true);
+    } else {
+      // Fallback (also used for pawns): Any (legal) moves.
+      moves = generate_moves();
+    }
+
     for (var i = 0, len = moves.length; i < len; i++) {
       // try the strict parser first, then the sloppy parser if requested
       // by the user
@@ -1356,9 +1409,9 @@ var Chess = function(fen) {
       return load(fen);
     },
 
-    reset: function() {
-      return reset();
-    },
+    // reset: function() {
+    //   return reset();
+    // },
 
     moves: function(options) {
       /* The internal representation of a chess move is in 0x88 format, and
@@ -1386,32 +1439,32 @@ var Chess = function(fen) {
       return moves;
     },
 
-    in_check: function() {
-      return in_check();
-    },
+    // in_check: function() {
+    //   return in_check();
+    // },
 
-    in_checkmate: function() {
-      return in_checkmate();
-    },
+    // in_checkmate: function() {
+    //   return in_checkmate();
+    // },
 
-    in_stalemate: function() {
-      return in_stalemate();
-    },
+    // in_stalemate: function() {
+    //   return in_stalemate();
+    // },
 
-    in_draw: function() {
-      return half_moves >= 100 ||
-             in_stalemate() ||
-             insufficient_material() ||
-             in_threefold_repetition();
-    },
+    // in_draw: function() {
+    //   return half_moves >= 100 ||
+    //          in_stalemate() ||
+    //          insufficient_material() ||
+    //          in_threefold_repetition();
+    // },
 
-    insufficient_material: function() {
-      return insufficient_material();
-    },
+    // insufficient_material: function() {
+    //   return insufficient_material();
+    // },
 
-    in_threefold_repetition: function() {
-      return in_threefold_repetition();
-    },
+    // in_threefold_repetition: function() {
+    //   return in_threefold_repetition();
+    // },
 
     game_over: function() {
       return half_moves >= 100 ||
@@ -1421,263 +1474,263 @@ var Chess = function(fen) {
              in_threefold_repetition();
     },
 
-    validate_fen: function(fen) {
-      return validate_fen(fen);
-    },
+    // validate_fen: function(fen) {
+    //   return validate_fen(fen);
+    // },
 
     fen: function() {
       return generate_fen();
     },
 
-    board: function() {
-      var output = [],
-          row    = [];
-
-      for (var i = SQUARES.a8; i <= SQUARES.h1; i++) {
-        if (board[i] == null) {
-          row.push(null)
-        } else {
-          row.push({type: board[i].type, color: board[i].color})
-        }
-        if ((i + 1) & 0x88) {
-          output.push(row);
-          row = []
-          i += 8;
-        }
-      }
-
-      return output;
-    },
-
-    pgn: function(options) {
-      /* using the specification from http://www.chessclub.com/help/PGN-spec
-       * example for html usage: .pgn({ max_width: 72, newline_char: "<br />" })
-       */
-      var newline = (typeof options === 'object' &&
-                     typeof options.newline_char === 'string') ?
-                     options.newline_char : '\n';
-      var max_width = (typeof options === 'object' &&
-                       typeof options.max_width === 'number') ?
-                       options.max_width : 0;
-      var result = [];
-      var header_exists = false;
-
-      /* add the PGN header headerrmation */
-      for (var i in header) {
-        /* TODO: order of enumerated properties in header object is not
-         * guaranteed, see ECMA-262 spec (section 12.6.4)
-         */
-        result.push('[' + i + ' \"' + header[i] + '\"]' + newline);
-        header_exists = true;
-      }
-
-      if (header_exists && history.length) {
-        result.push(newline);
-      }
-
-      /* pop all of history onto reversed_history */
-      var reversed_history = [];
-      while (history.length > 0) {
-        reversed_history.push(undo_move());
-      }
-
-      var moves = [];
-      var move_string = '';
-
-      /* build the list of moves.  a move_string looks like: "3. e3 e6" */
-      while (reversed_history.length > 0) {
-        var move = reversed_history.pop();
-
-        /* if the position started with black to move, start PGN with 1. ... */
-        if (!history.length && move.color === 'b') {
-          move_string = move_number + '. ...';
-        } else if (move.color === 'w') {
-          /* store the previous generated move_string if we have one */
-          if (move_string.length) {
-            moves.push(move_string);
-          }
-          move_string = move_number + '.';
-        }
-
-        move_string = move_string + ' ' + move_to_san(move, false);
-        make_move(move);
-      }
-
-      /* are there any other leftover moves? */
-      if (move_string.length) {
-        moves.push(move_string);
-      }
-
-      /* is there a result? */
-      if (typeof header.Result !== 'undefined') {
-        moves.push(header.Result);
-      }
-
-      /* history should be back to what is was before we started generating PGN,
-       * so join together moves
-       */
-      if (max_width === 0) {
-        return result.join('') + moves.join(' ');
-      }
-
-      /* wrap the PGN output at max_width */
-      var current_width = 0;
-      for (var i = 0; i < moves.length; i++) {
-        /* if the current move will push past max_width */
-        if (current_width + moves[i].length > max_width && i !== 0) {
-
-          /* don't end the line with whitespace */
-          if (result[result.length - 1] === ' ') {
-            result.pop();
-          }
-
-          result.push(newline);
-          current_width = 0;
-        } else if (i !== 0) {
-          result.push(' ');
-          current_width++;
-        }
-        result.push(moves[i]);
-        current_width += moves[i].length;
-      }
-
-      return result.join('');
-    },
-
-    load_pgn: function(pgn, options) {
-      // allow the user to specify the sloppy move parser to work around over
-      // disambiguation bugs in Fritz and Chessbase
-      var sloppy = (typeof options !== 'undefined' && 'sloppy' in options) ?
-                    options.sloppy : false;
-
-      function mask(str) {
-        return str.replace(/\\/g, '\\');
-      }
-
-      function has_keys(object) {
-        for (var key in object) {
-          return true;
-        }
-        return false;
-      }
-
-      function parse_pgn_header(header, options) {
-        var newline_char = (typeof options === 'object' &&
-                            typeof options.newline_char === 'string') ?
-                            options.newline_char : '\r?\n';
-        var header_obj = {};
-        var headers = header.split(new RegExp(mask(newline_char)));
-        var key = '';
-        var value = '';
-
-        for (var i = 0; i < headers.length; i++) {
-          key = headers[i].replace(/^\[([A-Z][A-Za-z]*)\s.*\]$/, '$1');
-          value = headers[i].replace(/^\[[A-Za-z]+\s"(.*)"\]$/, '$1');
-          if (trim(key).length > 0) {
-            header_obj[key] = value;
-          }
-        }
-
-        return header_obj;
-      }
-
-      var newline_char = (typeof options === 'object' &&
-                          typeof options.newline_char === 'string') ?
-                          options.newline_char : '\r?\n';
-      var regex = new RegExp('^(\\[(.|' + mask(newline_char) + ')*\\])' +
-                             '(' + mask(newline_char) + ')*' +
-                             '1.(' + mask(newline_char) + '|.)*$', 'g');
-
-      /* get header part of the PGN file */
-      var header_string = pgn.replace(regex, '$1');
-
-      /* no info part given, begins with moves */
-      if (header_string[0] !== '[') {
-        header_string = '';
-      }
-
-      reset();
-
-      /* parse PGN header */
-      var headers = parse_pgn_header(header_string, options);
-      for (var key in headers) {
-        set_header([key, headers[key]]);
-      }
-
-      /* load the starting position indicated by [Setup '1'] and
-      * [FEN position] */
-      if (headers['SetUp'] === '1') {
-          if (!(('FEN' in headers) && load(headers['FEN'], true ))) { // second argument to load: don't clear the headers
-            return false;
-          }
-      }
-
-      /* delete header to get the moves */
-      var ms = pgn.replace(header_string, '').replace(new RegExp(mask(newline_char), 'g'), ' ');
-
-      /* delete comments */
-      ms = ms.replace(/(\{[^}]+\})+?/g, '');
-
-      /* delete recursive annotation variations */
-      var rav_regex = /(\([^\(\)]+\))+?/g
-      while (rav_regex.test(ms)) {
-        ms = ms.replace(rav_regex, '');
-      }
-
-      /* delete move numbers */
-      ms = ms.replace(/\d+\.(\.\.)?/g, '');
-
-      /* delete ... indicating black to move */
-      ms = ms.replace(/\.\.\./g, '');
-
-      /* delete numeric annotation glyphs */
-      ms = ms.replace(/\$\d+/g, '');
-
-      /* trim and get array of moves */
-      var moves = trim(ms).split(new RegExp(/\s+/));
-
-      /* delete empty entries */
-      moves = moves.join(',').replace(/,,+/g, ',').split(',');
-      var move = '';
-
-      for (var half_move = 0; half_move < moves.length - 1; half_move++) {
-        move = move_from_san(moves[half_move], sloppy);
-
-        /* move not possible! (don't clear the board to examine to show the
-         * latest valid position)
-         */
-        if (move == null) {
-          return false;
-        } else {
-          make_move(move);
-        }
-      }
-
-      /* examine last move */
-      move = moves[moves.length - 1];
-      if (POSSIBLE_RESULTS.indexOf(move) > -1) {
-        if (has_keys(header) && typeof header.Result === 'undefined') {
-          set_header(['Result', move]);
-        }
-      }
-      else {
-        move = move_from_san(move, sloppy);
-        if (move == null) {
-          return false;
-        } else {
-          make_move(move);
-        }
-      }
-      return true;
-    },
-
-    header: function() {
-      return set_header(arguments);
-    },
-
-    ascii: function() {
-      return ascii();
-    },
+    // board: function() {
+    //   var output = [],
+    //       row    = [];
+
+    //   for (var i = SQUARES.a8; i <= SQUARES.h1; i++) {
+    //     if (board[i] == null) {
+    //       row.push(null)
+    //     } else {
+    //       row.push({type: board[i].type, color: board[i].color})
+    //     }
+    //     if ((i + 1) & 0x88) {
+    //       output.push(row);
+    //       row = []
+    //       i += 8;
+    //     }
+    //   }
+
+    //   return output;
+    // },
+
+    // pgn: function(options) {
+    //   /* using the specification from http://www.chessclub.com/help/PGN-spec
+    //    * example for html usage: .pgn({ max_width: 72, newline_char: "<br />" })
+    //    */
+    //   var newline = (typeof options === 'object' &&
+    //                  typeof options.newline_char === 'string') ?
+    //                  options.newline_char : '\n';
+    //   var max_width = (typeof options === 'object' &&
+    //                    typeof options.max_width === 'number') ?
+    //                    options.max_width : 0;
+    //   var result = [];
+    //   var header_exists = false;
+
+    //   /* add the PGN header headerrmation */
+    //   for (var i in header) {
+    //     /* TODO: order of enumerated properties in header object is not
+    //      * guaranteed, see ECMA-262 spec (section 12.6.4)
+    //      */
+    //     result.push('[' + i + ' \"' + header[i] + '\"]' + newline);
+    //     header_exists = true;
+    //   }
+
+    //   if (header_exists && history.length) {
+    //     result.push(newline);
+    //   }
+
+    //   /* pop all of history onto reversed_history */
+    //   var reversed_history = [];
+    //   while (history.length > 0) {
+    //     reversed_history.push(undo_move());
+    //   }
+
+    //   var moves = [];
+    //   var move_string = '';
+
+    //   /* build the list of moves.  a move_string looks like: "3. e3 e6" */
+    //   while (reversed_history.length > 0) {
+    //     var move = reversed_history.pop();
+
+    //     /* if the position started with black to move, start PGN with 1. ... */
+    //     if (!history.length && move.color === 'b') {
+    //       move_string = move_number + '. ...';
+    //     } else if (move.color === 'w') {
+    //       /* store the previous generated move_string if we have one */
+    //       if (move_string.length) {
+    //         moves.push(move_string);
+    //       }
+    //       move_string = move_number + '.';
+    //     }
+
+    //     move_string = move_string + ' ' + move_to_san(move, false);
+    //     make_move(move);
+    //   }
+
+    //   /* are there any other leftover moves? */
+    //   if (move_string.length) {
+    //     moves.push(move_string);
+    //   }
+
+    //   /* is there a result? */
+    //   if (typeof header.Result !== 'undefined') {
+    //     moves.push(header.Result);
+    //   }
+
+    //   /* history should be back to what is was before we started generating PGN,
+    //    * so join together moves
+    //    */
+    //   if (max_width === 0) {
+    //     return result.join('') + moves.join(' ');
+    //   }
+
+    //   /* wrap the PGN output at max_width */
+    //   var current_width = 0;
+    //   for (var i = 0; i < moves.length; i++) {
+    //     /* if the current move will push past max_width */
+    //     if (current_width + moves[i].length > max_width && i !== 0) {
+
+    //       /* don't end the line with whitespace */
+    //       if (result[result.length - 1] === ' ') {
+    //         result.pop();
+    //       }
+
+    //       result.push(newline);
+    //       current_width = 0;
+    //     } else if (i !== 0) {
+    //       result.push(' ');
+    //       current_width++;
+    //     }
+    //     result.push(moves[i]);
+    //     current_width += moves[i].length;
+    //   }
+
+    //   return result.join('');
+    // },
+
+    // load_pgn: function(pgn, options) {
+    //   // allow the user to specify the sloppy move parser to work around over
+    //   // disambiguation bugs in Fritz and Chessbase
+    //   var sloppy = (typeof options !== 'undefined' && 'sloppy' in options) ?
+    //                 options.sloppy : false;
+
+    //   function mask(str) {
+    //     return str.replace(/\\/g, '\\');
+    //   }
+
+    //   function has_keys(object) {
+    //     for (var key in object) {
+    //       return true;
+    //     }
+    //     return false;
+    //   }
+
+    //   function parse_pgn_header(header, options) {
+    //     var newline_char = (typeof options === 'object' &&
+    //                         typeof options.newline_char === 'string') ?
+    //                         options.newline_char : '\r?\n';
+    //     var header_obj = {};
+    //     var headers = header.split(new RegExp(mask(newline_char)));
+    //     var key = '';
+    //     var value = '';
+
+    //     for (var i = 0; i < headers.length; i++) {
+    //       key = headers[i].replace(/^\[([A-Z][A-Za-z]*)\s.*\]$/, '$1');
+    //       value = headers[i].replace(/^\[[A-Za-z]+\s"(.*)"\]$/, '$1');
+    //       if (trim(key).length > 0) {
+    //         header_obj[key] = value;
+    //       }
+    //     }
+
+    //     return header_obj;
+    //   }
+
+    //   var newline_char = (typeof options === 'object' &&
+    //                       typeof options.newline_char === 'string') ?
+    //                       options.newline_char : '\r?\n';
+    //   var regex = new RegExp('^(\\[(.|' + mask(newline_char) + ')*\\])' +
+    //                          '(' + mask(newline_char) + ')*' +
+    //                          '1.(' + mask(newline_char) + '|.)*$', 'g');
+
+    //   /* get header part of the PGN file */
+    //   var header_string = pgn.replace(regex, '$1');
+
+    //   /* no info part given, begins with moves */
+    //   if (header_string[0] !== '[') {
+    //     header_string = '';
+    //   }
+
+    //   reset();
+
+    //   /* parse PGN header */
+    //   var headers = parse_pgn_header(header_string, options);
+    //   for (var key in headers) {
+    //     set_header([key, headers[key]]);
+    //   }
+
+    //   /* load the starting position indicated by [Setup '1'] and
+    //   * [FEN position] */
+    //   if (headers['SetUp'] === '1') {
+    //       if (!(('FEN' in headers) && load(headers['FEN'], true ))) { // second argument to load: don't clear the headers
+    //         return false;
+    //       }
+    //   }
+
+    //   /* delete header to get the moves */
+    //   var ms = pgn.replace(header_string, '').replace(new RegExp(mask(newline_char), 'g'), ' ');
+
+    //   /* delete comments */
+    //   ms = ms.replace(/(\{[^}]+\})+?/g, '');
+
+    //   /* delete recursive annotation variations */
+    //   var rav_regex = /(\([^\(\)]+\))+?/g
+    //   while (rav_regex.test(ms)) {
+    //     ms = ms.replace(rav_regex, '');
+    //   }
+
+    //   /* delete move numbers */
+    //   ms = ms.replace(/\d+\.(\.\.)?/g, '');
+
+    //   /* delete ... indicating black to move */
+    //   ms = ms.replace(/\.\.\./g, '');
+
+    //   /* delete numeric annotation glyphs */
+    //   ms = ms.replace(/\$\d+/g, '');
+
+    //   /* trim and get array of moves */
+    //   var moves = trim(ms).split(new RegExp(/\s+/));
+
+    //   /* delete empty entries */
+    //   moves = moves.join(',').replace(/,,+/g, ',').split(',');
+    //   var move = '';
+
+    //   for (var half_move = 0; half_move < moves.length - 1; half_move++) {
+    //     move = move_from_san(moves[half_move], sloppy);
+
+    //     /* move not possible! (don't clear the board to examine to show the
+    //      * latest valid position)
+    //      */
+    //     if (move == null) {
+    //       return false;
+    //     } else {
+    //       make_move(move);
+    //     }
+    //   }
+
+    //   /* examine last move */
+    //   move = moves[moves.length - 1];
+    //   if (POSSIBLE_RESULTS.indexOf(move) > -1) {
+    //     if (has_keys(header) && typeof header.Result === 'undefined') {
+    //       set_header(['Result', move]);
+    //     }
+    //   }
+    //   else {
+    //     move = move_from_san(move, sloppy);
+    //     if (move == null) {
+    //       return false;
+    //     } else {
+    //       make_move(move);
+    //     }
+    //   }
+    //   return true;
+    // },
+
+    // header: function() {
+    //   return set_header(arguments);
+    // },
+
+    // ascii: function() {
+    //   return ascii();
+    // },
 
     turn: function() {
       return turn;
@@ -1742,30 +1795,30 @@ var Chess = function(fen) {
       return clear();
     },
 
-    put: function(piece, square) {
-      return put(piece, square);
-    },
+    // put: function(piece, square) {
+    //   return put(piece, square);
+    // },
 
-    get: function(square) {
-      return get(square);
-    },
+    // get: function(square) {
+    //   return get(square);
+    // },
 
-    remove: function(square) {
-      return remove(square);
-    },
+    // remove: function(square) {
+    //   return remove(square);
+    // },
 
-    perft: function(depth) {
-      return perft(depth);
-    },
+    // perft: function(depth) {
+    //   return perft(depth);
+    // },
 
-    square_color: function(square) {
-      if (square in SQUARES) {
-        var sq_0x88 = SQUARES[square];
-        return ((rank(sq_0x88) + file(sq_0x88)) % 2 === 0) ? 'light' : 'dark';
-      }
+    // square_color: function(square) {
+    //   if (square in SQUARES) {
+    //     var sq_0x88 = SQUARES[square];
+    //     return ((rank(sq_0x88) + file(sq_0x88)) % 2 === 0) ? 'light' : 'dark';
+    //   }
 
-      return null;
-    },
+    //   return null;
+    // },
 
     history: function(options) {
       var reversed_history = [];
diff --git a/www/js/chess.min.js b/www/js/chess.min.js
deleted file mode 100644
index 095468d..0000000
--- a/www/js/chess.min.js
+++ /dev/null
@@ -1,6 +0,0 @@
-"use strict";/* @license
- * Copyright (c) 2015, Jeff Hlywa (jhlywa@gmail.com)
- * Released under the BSD license
- * https://github.com/jhlywa/chess.js/blob/master/LICENSE
- */
-var Chess=function(r){function e(){fr=new Array(128),ar={w:Q,b:Q},ur=K,lr={w:0,b:0},sr=Q,pr=0,cr=1,vr=[],gr={},a(i())}function n(){t(F)}function t(r){var n=r.split(/\s+/),t=n[0],f=0;if(!o(r).valid)return!1;e();for(var u=0;u<t.length;u++){var s=t.charAt(u);if("/"===s)f+=8;else if(R(s))f+=parseInt(s,10);else{var p="a">s?K:q;l({type:s.toLowerCase(),color:p},w(f)),f++}}return ur=n[1],n[2].indexOf("K")>-1&&(lr.w|=Y.KSIDE_CASTLE),n[2].indexOf("Q")>-1&&(lr.w|=Y.QSIDE_CASTLE),n[2].indexOf("k")>-1&&(lr.b|=Y.KSIDE_CASTLE),n[2].indexOf("q")>-1&&(lr.b|=Y.QSIDE_CASTLE),sr="-"===n[3]?Q:or[n[3]],pr=parseInt(n[4],10),cr=parseInt(n[5],10),a(i()),!0}function o(r){var e={0:"No errors.",1:"FEN string must contain six space-delimited fields.",2:"6th field (move number) must be a positive integer.",3:"5th field (half move counter) must be a non-negative integer.",4:"4th field (en-passant square) is invalid.",5:"3rd field (castling availability) is invalid.",6:"2nd field (side to move) is invalid.",7:"1st field (piece positions) does not contain 8 '/'-delimited rows.",8:"1st field (piece positions) is invalid [consecutive numbers].",9:"1st field (piece positions) is invalid [invalid piece].",10:"1st field (piece positions) is invalid [row too large]."},n=r.split(/\s+/);if(6!==n.length)return{valid:!1,error_number:1,error:e[1]};if(isNaN(n[5])||parseInt(n[5],10)<=0)return{valid:!1,error_number:2,error:e[2]};if(isNaN(n[4])||parseInt(n[4],10)<0)return{valid:!1,error_number:3,error:e[3]};if(!/^(-|[abcdefgh][36])$/.test(n[3]))return{valid:!1,error_number:4,error:e[4]};if(!/^(KQ?k?q?|Qk?q?|kq?|q|-)$/.test(n[2]))return{valid:!1,error_number:5,error:e[5]};if(!/^(w|b)$/.test(n[1]))return{valid:!1,error_number:6,error:e[6]};var t=n[0].split("/");if(8!==t.length)return{valid:!1,error_number:7,error:e[7]};for(var o=0;o<t.length;o++){for(var i=0,f=!1,a=0;a<t[o].length;a++)if(isNaN(t[o][a])){if(!/^[prnbqkPRNBQK]$/.test(t[o][a]))return{valid:!1,error_number:9,error:e[9]};i+=1,f=!1}else{if(f)return{valid:!1,error_number:8,error:e[8]};i+=parseInt(t[o][a],10),f=!0}if(8!==i)return{valid:!1,error_number:10,error:e[10]}}return{valid:!0,error_number:0,error:e[0]}}function i(){for(var r=0,e="",n=or.a8;n<=or.h1;n++){if(null==fr[n])r++;else{r>0&&(e+=r,r=0);var t=fr[n].color,o=fr[n].type;e+=t===K?o.toUpperCase():o.toLowerCase()}n+1&136&&(r>0&&(e+=r),n!==or.h1&&(e+="/"),r=0,n+=8)}var i="";lr[K]&Y.KSIDE_CASTLE&&(i+="K"),lr[K]&Y.QSIDE_CASTLE&&(i+="Q"),lr[q]&Y.KSIDE_CASTLE&&(i+="k"),lr[q]&Y.QSIDE_CASTLE&&(i+="q"),i=i||"-";var f=sr===Q?"-":w(sr);return[e,ur,i,f,pr,cr].join(" ")}function f(r){for(var e=0;e<r.length;e+=2)"string"==typeof r[e]&&"string"==typeof r[e+1]&&(gr[r[e]]=r[e+1]);return gr}function a(r){vr.length>0||(r!==F?(gr.SetUp="1",gr.FEN=r):(delete gr.SetUp,delete gr.FEN))}function u(r){var e=fr[or[r]];return e?{type:e.type,color:e.color}:null}function l(r,e){if(!("type"in r&&"color"in r))return!1;if(-1===G.indexOf(r.type.toLowerCase()))return!1;if(!(e in or))return!1;var n=or[e];return r.type==M&&ar[r.color]!=Q&&ar[r.color]!=n?!1:(fr[n]={type:r.type,color:r.color},r.type===M&&(ar[r.color]=n),a(i()),!0)}function s(r){var e=u(r);return fr[or[r]]=null,e&&e.type===M&&(ar[e.color]=Q),a(i()),e}function p(r,e,n,t,o){var i={color:ur,from:e,to:n,flags:t,piece:r[e].type};return o&&(i.flags|=Y.PROMOTION,i.promotion=o),r[n]?i.captured=r[n].type:t&Y.EP_CAPTURE&&(i.captured=U),i}function c(r){function e(r,e,n,t,o){if(r[n].type!==U||I(t)!==tr&&I(t)!==rr)e.push(p(r,n,t,o));else for(var i=[B,j,$,x],f=0,a=i.length;a>f;f++)e.push(p(r,n,t,o,i[f]))}var n=[],t=ur,o=L(t),i={b:nr,w:er},f=or.a8,a=or.h1,u=!1,l="undefined"!=typeof r&&"legal"in r?r.legal:!0;if("undefined"!=typeof r&&"square"in r){if(!(r.square in or))return[];f=a=or[r.square],u=!0}for(var s=f;a>=s;s++)if(136&s)s+=7;else{var c=fr[s];if(null!=c&&c.color===t)if(c.type===U){var v=s+H[t][0];if(null==fr[v]){e(fr,n,s,v,Y.NORMAL);var v=s+H[t][1];i[t]===I(s)&&null==fr[v]&&e(fr,n,s,v,Y.BIG_PAWN)}for(E=2;4>E;E++){var v=s+H[t][E];136&v||(null!=fr[v]&&fr[v].color===o?e(fr,n,s,v,Y.CAPTURE):v===sr&&e(fr,n,s,sr,Y.EP_CAPTURE))}}else for(var E=0,d=Z[c.type].length;d>E;E++)for(var b=Z[c.type][E],v=s;;){if(v+=b,136&v)break;if(null!=fr[v]){if(fr[v].color===t)break;e(fr,n,s,v,Y.CAPTURE);break}if(e(fr,n,s,v,Y.NORMAL),"n"===c.type||"k"===c.type)break}}if(!u||a===ar[t]){if(lr[t]&Y.KSIDE_CASTLE){var _=ar[t],A=_+2;null!=fr[_+1]||null!=fr[A]||g(o,ar[t])||g(o,_+1)||g(o,A)||e(fr,n,ar[t],A,Y.KSIDE_CASTLE)}if(lr[t]&Y.QSIDE_CASTLE){var _=ar[t],A=_-2;null!=fr[_-1]||null!=fr[_-2]||null!=fr[_-3]||g(o,ar[t])||g(o,_-1)||g(o,A)||e(fr,n,ar[t],A,Y.QSIDE_CASTLE)}}if(!l)return n;for(var S=[],s=0,d=n.length;d>s;s++)y(n[s]),h(t)||S.push(n[s]),m();return S}function v(r){var e="";if(r.flags&Y.KSIDE_CASTLE)e="O-O";else if(r.flags&Y.QSIDE_CASTLE)e="O-O-O";else{var n=C(r);r.piece!==U&&(e+=r.piece.toUpperCase()+n),r.flags&(Y.CAPTURE|Y.EP_CAPTURE)&&(r.piece===U&&(e+=w(r.from)[0]),e+="x"),e+=w(r.to),r.flags&Y.PROMOTION&&(e+="="+r.promotion.toUpperCase())}return y(r),E()&&(e+=d()?"#":"+"),m(),e}function g(r,e){for(var n=or.a8;n<=or.h1;n++)if(136&n)n+=7;else if(null!=fr[n]&&fr[n].color===r){var t=fr[n],o=n-e,i=o+119;if(z[i]&1<<V[t.type]){if(t.type===U){if(o>0){if(t.color===K)return!0}else if(t.color===q)return!0;continue}if("n"===t.type||"k"===t.type)return!0;for(var f=J[i],a=n+f,u=!1;a!==e;){if(null!=fr[a]){u=!0;break}a+=f}if(!u)return!0}}return!1}function h(r){return g(L(r),ar[r])}function E(){return h(ur)}function d(){return E()&&0===c().length}function b(){return!E()&&0===c().length}function _(){for(var r={},e=[],n=0,t=0,o=or.a8;o<=or.h1;o++)if(t=(t+1)%2,136&o)o+=7;else{var i=fr[o];i&&(r[i.type]=i.type in r?r[i.type]+1:1,i.type===$&&e.push(t),n++)}if(2===n)return!0;if(3===n&&(1===r[$]||1===r[x]))return!0;if(n===r[$]+2){for(var f=0,a=e.length,o=0;a>o;o++)f+=e[o];if(0===f||f===a)return!0}return!1}function A(){for(var r=[],e={},n=!1;;){var t=m();if(!t)break;r.push(t)}for(;;){var o=i().split(" ").slice(0,4).join(" ");if(e[o]=o in e?e[o]+1:1,e[o]>=3&&(n=!0),!r.length)break;y(r.pop())}return n}function S(r){vr.push({move:r,kings:{b:ar.b,w:ar.w},turn:ur,castling:{b:lr.b,w:lr.w},ep_square:sr,half_moves:pr,move_number:cr})}function y(r){var e=ur,n=L(e);if(S(r),fr[r.to]=fr[r.from],fr[r.from]=null,r.flags&Y.EP_CAPTURE&&(ur===q?fr[r.to-16]=null:fr[r.to+16]=null),r.flags&Y.PROMOTION&&(fr[r.to]={type:r.promotion,color:e}),fr[r.to].type===M){if(ar[fr[r.to].color]=r.to,r.flags&Y.KSIDE_CASTLE){var t=r.to-1,o=r.to+1;fr[t]=fr[o],fr[o]=null}else if(r.flags&Y.QSIDE_CASTLE){var t=r.to+1,o=r.to-2;fr[t]=fr[o],fr[o]=null}lr[e]=""}if(lr[e])for(var i=0,f=ir[e].length;f>i;i++)if(r.from===ir[e][i].square&&lr[e]&ir[e][i].flag){lr[e]^=ir[e][i].flag;break}if(lr[n])for(var i=0,f=ir[n].length;f>i;i++)if(r.to===ir[n][i].square&&lr[n]&ir[n][i].flag){lr[n]^=ir[n][i].flag;break}sr=r.flags&Y.BIG_PAWN?"b"===ur?r.to-16:r.to+16:Q,r.piece===U?pr=0:r.flags&(Y.CAPTURE|Y.EP_CAPTURE)?pr=0:pr++,ur===q&&cr++,ur=L(ur)}function m(){var r=vr.pop();if(null==r)return null;var e=r.move;ar=r.kings,ur=r.turn,lr=r.castling,sr=r.ep_square,pr=r.half_moves,cr=r.move_number;var n=ur,t=L(ur);if(fr[e.from]=fr[e.to],fr[e.from].type=e.piece,fr[e.to]=null,e.flags&Y.CAPTURE)fr[e.to]={type:e.captured,color:t};else if(e.flags&Y.EP_CAPTURE){var o;o=n===q?e.to-16:e.to+16,fr[o]={type:U,color:t}}if(e.flags&(Y.KSIDE_CASTLE|Y.QSIDE_CASTLE)){var i,f;e.flags&Y.KSIDE_CASTLE?(i=e.to+1,f=e.to-1):e.flags&Y.QSIDE_CASTLE&&(i=e.to-2,f=e.to+1),fr[i]=fr[f],fr[f]=null}return e}function C(r){for(var e=c(),n=r.from,t=r.to,o=r.piece,i=0,f=0,a=0,u=0,l=e.length;l>u;u++){var s=e[u].from,p=e[u].to,v=e[u].piece;o===v&&n!==s&&t===p&&(i++,I(n)===I(s)&&f++,P(n)===P(s)&&a++)}return i>0?f>0&&a>0?w(n):w(n).charAt(a>0?1:0):""}function T(){for(var r="   +------------------------+\n",e=or.a8;e<=or.h1;e++){if(0===P(e)&&(r+=" "+"87654321"[I(e)]+" |"),null==fr[e])r+=" . ";else{var n=fr[e].type,t=fr[e].color,o=t===K?n.toUpperCase():n.toLowerCase();r+=" "+o+" "}e+1&136&&(r+="|\n",e+=8)}return r+="   +------------------------+\n",r+="     a  b  c  d  e  f  g  h\n"}function I(r){return r>>4}function P(r){return 15&r}function w(r){var e=P(r),n=I(r);return"abcdefgh".substring(e,e+1)+"87654321".substring(n,n+1)}function L(r){return r===K?q:K}function R(r){return-1!=="0123456789".indexOf(r)}function O(r){var e=N(r);e.san=v(e),e.to=w(e.to),e.from=w(e.from);var n="";for(var t in Y)Y[t]&e.flags&&(n+=X[t]);return e.flags=n,e}function N(r){var e=r instanceof Array?[]:{};for(var n in r)"object"==typeof n?e[n]=N(r[n]):e[n]=r[n];return e}function k(r){return r.replace(/^\s+|\s+$/g,"")}function D(r){for(var e=c({legal:!1}),n=0,t=ur,o=0,i=e.length;i>o;o++){if(y(e[o]),!h(t))if(r-1>0){var f=D(r-1);n+=f}else n++;m()}return n}var q="b",K="w",Q=-1,U="p",x="n",$="b",j="r",B="q",M="k",G="pnbrqkPNBRQK",F="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",W=["1-0","0-1","1/2-1/2","*"],H={b:[16,32,17,15],w:[-16,-32,-17,-15]},Z={n:[-18,-33,-31,-14,18,33,31,14],b:[-17,-15,17,15],r:[-16,1,16,-1],q:[-17,-16,-15,1,17,16,15,-1],k:[-17,-16,-15,1,17,16,15,-1]},z=[20,0,0,0,0,0,0,24,0,0,0,0,0,0,20,0,0,20,0,0,0,0,0,24,0,0,0,0,0,20,0,0,0,0,20,0,0,0,0,24,0,0,0,0,20,0,0,0,0,0,0,20,0,0,0,24,0,0,0,20,0,0,0,0,0,0,0,0,20,0,0,24,0,0,20,0,0,0,0,0,0,0,0,0,0,20,2,24,2,20,0,0,0,0,0,0,0,0,0,0,0,2,53,56,53,2,0,0,0,0,0,0,24,24,24,24,24,24,56,0,56,24,24,24,24,24,24,0,0,0,0,0,0,2,53,56,53,2,0,0,0,0,0,0,0,0,0,0,0,20,2,24,2,20,0,0,0,0,0,0,0,0,0,0,20,0,0,24,0,0,20,0,0,0,0,0,0,0,0,20,0,0,0,24,0,0,0,20,0,0,0,0,0,0,20,0,0,0,0,24,0,0,0,0,20,0,0,0,0,20,0,0,0,0,0,24,0,0,0,0,0,20,0,0,20,0,0,0,0,0,0,24,0,0,0,0,0,0,20],J=[17,0,0,0,0,0,0,16,0,0,0,0,0,0,15,0,0,17,0,0,0,0,0,16,0,0,0,0,0,15,0,0,0,0,17,0,0,0,0,16,0,0,0,0,15,0,0,0,0,0,0,17,0,0,0,16,0,0,0,15,0,0,0,0,0,0,0,0,17,0,0,16,0,0,15,0,0,0,0,0,0,0,0,0,0,17,0,16,0,15,0,0,0,0,0,0,0,0,0,0,0,0,17,16,15,0,0,0,0,0,0,0,1,1,1,1,1,1,1,0,-1,-1,-1,-1,-1,-1,-1,0,0,0,0,0,0,0,-15,-16,-17,0,0,0,0,0,0,0,0,0,0,0,0,-15,0,-16,0,-17,0,0,0,0,0,0,0,0,0,0,-15,0,0,-16,0,0,-17,0,0,0,0,0,0,0,0,-15,0,0,0,-16,0,0,0,-17,0,0,0,0,0,0,-15,0,0,0,0,-16,0,0,0,0,-17,0,0,0,0,-15,0,0,0,0,0,-16,0,0,0,0,0,-17,0,0,-15,0,0,0,0,0,0,-16,0,0,0,0,0,0,-17],V={p:0,n:1,b:2,r:3,q:4,k:5},X={NORMAL:"n",CAPTURE:"c",BIG_PAWN:"b",EP_CAPTURE:"e",PROMOTION:"p",KSIDE_CASTLE:"k",QSIDE_CASTLE:"q"},Y={NORMAL:1,CAPTURE:2,BIG_PAWN:4,EP_CAPTURE:8,PROMOTION:16,KSIDE_CASTLE:32,QSIDE_CASTLE:64},rr=7,er=6,nr=1,tr=0,or={a8:0,b8:1,c8:2,d8:3,e8:4,f8:5,g8:6,h8:7,a7:16,b7:17,c7:18,d7:19,e7:20,f7:21,g7:22,h7:23,a6:32,b6:33,c6:34,d6:35,e6:36,f6:37,g6:38,h6:39,a5:48,b5:49,c5:50,d5:51,e5:52,f5:53,g5:54,h5:55,a4:64,b4:65,c4:66,d4:67,e4:68,f4:69,g4:70,h4:71,a3:80,b3:81,c3:82,d3:83,e3:84,f3:85,g3:86,h3:87,a2:96,b2:97,c2:98,d2:99,e2:100,f2:101,g2:102,h2:103,a1:112,b1:113,c1:114,d1:115,e1:116,f1:117,g1:118,h1:119},ir={w:[{square:or.a1,flag:Y.QSIDE_CASTLE},{square:or.h1,flag:Y.KSIDE_CASTLE}],b:[{square:or.a8,flag:Y.QSIDE_CASTLE},{square:or.h8,flag:Y.KSIDE_CASTLE}]},fr=new Array(128),ar={w:Q,b:Q},ur=K,lr={w:0,b:0},sr=Q,pr=0,cr=1,vr=[],gr={};return t("undefined"==typeof r?F:r),{WHITE:K,BLACK:q,PAWN:U,KNIGHT:x,BISHOP:$,ROOK:j,QUEEN:B,KING:M,SQUARES:function(){for(var r=[],e=or.a8;e<=or.h1;e++)136&e?e+=7:r.push(w(e));return r}(),FLAGS:X,load:function(r){return t(r)},reset:function(){return n()},moves:function(r){for(var e=c(r),n=[],t=0,o=e.length;o>t;t++)n.push("undefined"!=typeof r&&"verbose"in r&&r.verbose?O(e[t]):v(e[t]));return n},in_check:function(){return E()},in_checkmate:function(){return d()},in_stalemate:function(){return b()},in_draw:function(){return pr>=100||b()||_()||A()},insufficient_material:function(){return _()},in_threefold_repetition:function(){return A()},game_over:function(){return pr>=100||d()||b()||_()||A()},validate_fen:function(r){return o(r)},fen:function(){return i()},pgn:function(r){var e="object"==typeof r&&"string"==typeof r.newline_char?r.newline_char:"\n",n="object"==typeof r&&"number"==typeof r.max_width?r.max_width:0,t=[],o=!1;for(var i in gr)t.push("["+i+' "'+gr[i]+'"]'+e),o=!0;o&&vr.length&&t.push(e);for(var f=[];vr.length>0;)f.push(m());for(var a=[],u="",l=1;f.length>0;){var s=f.pop();1===l&&"b"===s.color?(u="1. ...",l++):"w"===s.color&&(u.length&&a.push(u),u=l+".",l++),u=u+" "+v(s),y(s)}if(u.length&&a.push(u),"undefined"!=typeof gr.Result&&a.push(gr.Result),0===n)return t.join("")+a.join(" ");for(var p=0,i=0;i<a.length;i++)p+a[i].length>n&&0!==i?(" "===t[t.length-1]&&t.pop(),t.push(e),p=0):0!==i&&(t.push(" "),p++),t.push(a[i]),p+=a[i].length;return t.join("")},load_pgn:function(r,e){function o(r){return r.replace(/\\/g,"\\")}function i(r){for(var e=r.replace(/=/,"").replace(/[+#]?[?!]*$/,""),n=c(),t=0,o=n.length;o>t;t++)if(e===v(n[t]).replace(/=/,"").replace(/[+#]?[?!]*$/,""))return n[t];return null}function a(r){return i(k(r))}function u(r){var e=!1;for(var n in r)e=!0;return e}function l(r,e){for(var n="object"==typeof e&&"string"==typeof e.newline_char?e.newline_char:"\r?\n",t={},i=r.split(new RegExp(o(n))),f="",a="",u=0;u<i.length;u++)f=i[u].replace(/^\[([A-Z][A-Za-z]*)\s.*\]$/,"$1"),a=i[u].replace(/^\[[A-Za-z]+\s"(.*)"\]$/,"$1"),k(f).length>0&&(t[f]=a);return t}var s="object"==typeof e&&"string"==typeof e.newline_char?e.newline_char:"\r?\n",p=new RegExp("^(\\[(.|"+o(s)+")*\\])("+o(s)+")*1.("+o(s)+"|.)*$","g"),g=r.replace(p,"$1");"["!==g[0]&&(g=""),n();var h=l(g,e);for(var E in h)f([E,h[E]]);if("1"===h.SetUp&&!("FEN"in h&&t(h.FEN)))return!1;var d=r.replace(g,"").replace(new RegExp(o(s),"g")," ");d=d.replace(/(\{[^}]+\})+?/g,"");for(var b=/(\([^\(\)]+\))+?/g;b.test(d);)d=d.replace(b,"");d=d.replace(/\d+\./g,""),d=d.replace(/\.\.\./g,"");var _=k(d).split(new RegExp(/\s+/));_=_.join(",").replace(/,,+/g,",").split(",");for(var A="",S=0;S<_.length-1;S++){if(A=a(_[S]),null==A)return!1;y(A)}if(A=_[_.length-1],W.indexOf(A)>-1)u(gr)&&"undefined"==typeof gr.Result&&f(["Result",A]);else{if(A=a(A),null==A)return!1;y(A)}return!0},header:function(){return f(arguments)},ascii:function(){return T()},turn:function(){return ur},move:function(r){var e=null,n=c();if("string"==typeof r){for(var t=r.replace(/=/,"").replace(/[+#]?[?!]*$/,""),o=0,i=n.length;i>o;o++)if(t===v(n[o]).replace(/=/,"").replace(/[+#]?[?!]*$/,"")){e=n[o];break}}else if("object"==typeof r)for(var o=0,i=n.length;i>o;o++)if(!(r.from!==w(n[o].from)||r.to!==w(n[o].to)||"promotion"in n[o]&&r.promotion!==n[o].promotion)){e=n[o];break}if(!e)return null;var f=O(e);return y(e),f},undo:function(){var r=m();return r?O(r):null},clear:function(){return e()},put:function(r,e){return l(r,e)},get:function(r){return u(r)},remove:function(r){return s(r)},perft:function(r){return D(r)},square_color:function(r){if(r in or){var e=or[r];return(I(e)+P(e))%2===0?"light":"dark"}return null},history:function(r){for(var e=[],n=[],t=("undefined"!=typeof r&&"verbose"in r&&r.verbose);vr.length>0;)e.push(m());for(;e.length>0;){var o=e.pop();n.push(t?O(o):v(o)),y(o)}return n}}};"undefined"!=typeof exports&&(exports.Chess=Chess),"undefined"!=typeof define&&define(function(){return Chess});
diff --git a/www/js/chessboard-0.3.0.js b/www/js/chessboard-0.3.0.js
index 4b24ec0..24aa3da 100644
--- a/www/js/chessboard-0.3.0.js
+++ b/www/js/chessboard-0.3.0.js
@@ -1,7 +1,8 @@
 /*!
- * chessboard.js v0.3.0
+ * chessboard.js v0.3.0+asn
  *
  * Copyright 2013 Chris Oakman
+ * Portions copyright 2022 Steinar H. Gunderson
  * Released under the MIT license
  * http://chessboardjs.com/license
  *
@@ -25,7 +26,7 @@ function validMove(move) {
   var tmp = move.split('-');
   if (tmp.length !== 2) return false;
 
-  return (validSquare(tmp[0]) === true && validSquare(tmp[1]) === true);
+  return validSquare(tmp[0]) && validSquare(tmp[1]);
 }
 
 function validSquare(square) {
@@ -66,9 +67,9 @@ function validPositionObject(pos) {
   if (typeof pos !== 'object') return false;
 
   for (var i in pos) {
-    if (pos.hasOwnProperty(i) !== true) continue;
+    if (!pos.hasOwnProperty(i)) continue;
 
-    if (validSquare(i) !== true || validPieceCode(pos[i]) !== true) {
+    if (!validSquare(i) || !validPieceCode(pos[i])) {
       return false;
     }
   }
@@ -103,7 +104,7 @@ function pieceCodeToFen(piece) {
 // convert FEN string to position object
 // returns false if the FEN string is invalid
 function fenToObj(fen) {
-  if (validFen(fen) !== true) {
+  if (!validFen(fen)) {
     return false;
   }
 
@@ -143,11 +144,12 @@ function fenToObj(fen) {
 // position object to FEN string
 // returns false if the obj is not a valid position object
 function objToFen(obj) {
-  if (validPositionObject(obj) !== true) {
+  if (!validPositionObject(obj)) {
     return false;
   }
 
   var fen = '';
+  let num_empty = 0;
 
   var currentRow = 8;
   for (var i = 0; i < 8; i++) {
@@ -155,33 +157,31 @@ function objToFen(obj) {
       var square = COLUMNS[j] + currentRow;
 
       // piece exists
-      if (obj.hasOwnProperty(square) === true) {
+      if (obj.hasOwnProperty(square)) {
+        if (num_empty > 0) {
+          fen += num_empty;
+          num_empty = 0;
+        }
         fen += pieceCodeToFen(obj[square]);
       }
 
       // empty space
       else {
-        fen += '1';
+        ++num_empty;
       }
     }
 
     if (i !== 7) {
+      if (num_empty > 0) {
+        fen += num_empty;
+        num_empty = 0;
+      }
       fen += '/';
     }
 
     currentRow--;
   }
 
-  // squeeze the numbers together
-  // haha, I love this solution...
-  fen = fen.replace(/11111111/g, '8');
-  fen = fen.replace(/1111111/g, '7');
-  fen = fen.replace(/111111/g, '6');
-  fen = fen.replace(/11111/g, '5');
-  fen = fen.replace(/1111/g, '4');
-  fen = fen.replace(/111/g, '3');
-  fen = fen.replace(/11/g, '2');
-
   return fen;
 }
 
@@ -198,8 +198,7 @@ cfg = cfg || {};
 // Constants
 //------------------------------------------------------------------------------
 
-var MINIMUM_JQUERY_VERSION = '1.7.0',
-  START_FEN = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR',
+var START_FEN = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR',
   START_POSITION = fenToObj(START_FEN);
 
 // use unique class names to prevent clashing with anything else on the page
@@ -208,16 +207,11 @@ var CSS = {
   alpha: 'alpha-d2270',
   board: 'board-b72b1',
   chessboard: 'chessboard-63f37',
-  clearfix: 'clearfix-7da63',
   highlight1: 'highlight1-32417',
   highlight2: 'highlight2-9c5d2',
   notation: 'notation-322f9',
   numeric: 'numeric-fc462',
   piece: 'piece-417db',
-  row: 'row-5277c',
-  sparePieces: 'spare-pieces-7492f',
-  sparePiecesBottom: 'spare-pieces-bottom-ae20f',
-  sparePiecesTop: 'spare-pieces-top-4028b',
   square: 'square-55d63'
 };
 var CSSColor = {};
@@ -231,9 +225,7 @@ CSSColor['black'] = 'black-3c85d';
 // DOM elements
 var containerEl,
   boardEl,
-  draggedPieceEl,
-  sparePiecesTopEl,
-  sparePiecesBottomEl;
+  draggedPieceEl;
 
 // constructor return object
 var widget = {};
@@ -242,57 +234,27 @@ var widget = {};
 // Stateful
 //------------------------------------------------------------------------------
 
-var ANIMATION_HAPPENING = false,
-  BOARD_BORDER_SIZE = 2,
-  CURRENT_ORIENTATION = 'white',
+var CURRENT_ORIENTATION = 'white',
   CURRENT_POSITION = {},
-  SQUARE_SIZE,
   DRAGGED_PIECE,
   DRAGGED_PIECE_LOCATION,
   DRAGGED_PIECE_SOURCE,
   DRAGGING_A_PIECE = false,
-  SPARE_PIECE_ELS_IDS = {},
-  SQUARE_ELS_IDS = {},
-  SQUARE_ELS_OFFSETS;
+  PIECE_ON_SQUARE = {};
 
 //------------------------------------------------------------------------------
 // JS Util Functions
 //------------------------------------------------------------------------------
 
-// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
+let id_counter = 0;
 function createId() {
-  return 'xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx'.replace(/x/g, function(c) {
-    var r = Math.random() * 16 | 0;
-    return r.toString(16);
-  });
+  return 'chesspiece-id-' + (id_counter++);
 }
 
 function deepCopy(thing) {
   return JSON.parse(JSON.stringify(thing));
 }
 
-function parseSemVer(version) {
-  var tmp = version.split('.');
-  return {
-    major: parseInt(tmp[0], 10),
-    minor: parseInt(tmp[1], 10),
-    patch: parseInt(tmp[2], 10)
-  };
-}
-
-// returns true if version is >= minimum
-function compareSemVer(version, minimum) {
-  version = parseSemVer(version);
-  minimum = parseSemVer(minimum);
-
-  var versionNum = (version.major * 10000 * 10000) +
-    (version.minor * 10000) + version.patch;
-  var minimumNum = (minimum.major * 10000 * 10000) +
-    (minimum.minor * 10000) + minimum.patch;
-
-  return (versionNum >= minimumNum);
-}
-
 //------------------------------------------------------------------------------
 // Validation / Errors
 //------------------------------------------------------------------------------
@@ -304,7 +266,7 @@ function compareSemVer(version, minimum) {
  */
 function error(code, msg, obj) {
   // do nothing if showErrors is not set
-  if (cfg.hasOwnProperty('showErrors') !== true ||
+  if (!cfg.hasOwnProperty('showErrors') ||
       cfg.showErrors === false) {
     return;
   }
@@ -359,39 +321,12 @@ function checkDeps() {
     }
 
     // set the containerEl
-    containerEl = $(el);
+    containerEl = el;
   }
 
-  // else it must be something that becomes a jQuery collection
-  // with size 1
-  // ie: a single DOM node or jQuery object
+  // else it must be a DOM node
   else {
-    containerEl = $(containerElOrId);
-
-    if (containerEl.length !== 1) {
-      window.alert('ChessBoard Error 1003: The first argument to ' +
-        'ChessBoard() must be an ID or a single DOM node.' +
-        '\n\nExiting...');
-      return false;
-    }
-  }
-
-  // JSON must exist
-  if (! window.JSON ||
-      typeof JSON.stringify !== 'function' ||
-      typeof JSON.parse !== 'function') {
-    window.alert('ChessBoard Error 1004: JSON does not exist. ' +
-      'Please include a JSON polyfill.\n\nExiting...');
-    return false;
-  }
-
-  // check for a compatible version of jQuery
-  if (! (typeof window.$ && $.fn && $.fn.jquery &&
-      compareSemVer($.fn.jquery, MINIMUM_JQUERY_VERSION) === true)) {
-    window.alert('ChessBoard Error 1005: Unable to find a valid version ' +
-      'of jQuery. Please include jQuery ' + MINIMUM_JQUERY_VERSION + ' or ' +
-      'higher on the page.\n\nExiting...');
-    return false;
+    containerEl = containerElOrId;
   }
 
   return true;
@@ -411,7 +346,7 @@ function validAnimationSpeed(speed) {
 
 // validate config / set default options
 function expandConfig() {
-  if (typeof cfg === 'string' || validPositionObject(cfg) === true) {
+  if (typeof cfg === 'string' || validPositionObject(cfg)) {
     cfg = {
       position: cfg
     };
@@ -433,61 +368,46 @@ function expandConfig() {
     cfg.draggable = false;
   }
 
-  // default for dropOffBoard is 'snapback'
-  if (cfg.dropOffBoard !== 'trash') {
-    cfg.dropOffBoard = 'snapback';
-  }
-
-  // default for sparePieces is false
-  if (cfg.sparePieces !== true) {
-    cfg.sparePieces = false;
-  }
-
-  // draggable must be true if sparePieces is enabled
-  if (cfg.sparePieces === true) {
-    cfg.draggable = true;
-  }
-
   // default piece theme is wikipedia
-  if (cfg.hasOwnProperty('pieceTheme') !== true ||
+  if (!cfg.hasOwnProperty('pieceTheme') ||
       (typeof cfg.pieceTheme !== 'string' &&
        typeof cfg.pieceTheme !== 'function')) {
     cfg.pieceTheme = 'img/chesspieces/wikipedia/{piece}.png';
   }
 
   // animation speeds
-  if (cfg.hasOwnProperty('appearSpeed') !== true ||
-      validAnimationSpeed(cfg.appearSpeed) !== true) {
+  if (!cfg.hasOwnProperty('appearSpeed') ||
+      !validAnimationSpeed(cfg.appearSpeed)) {
     cfg.appearSpeed = 200;
   }
-  if (cfg.hasOwnProperty('moveSpeed') !== true ||
-      validAnimationSpeed(cfg.moveSpeed) !== true) {
+  if (!cfg.hasOwnProperty('moveSpeed') ||
+      !validAnimationSpeed(cfg.moveSpeed)) {
     cfg.moveSpeed = 200;
   }
-  if (cfg.hasOwnProperty('snapbackSpeed') !== true ||
-      validAnimationSpeed(cfg.snapbackSpeed) !== true) {
+  if (!cfg.hasOwnProperty('snapbackSpeed') ||
+      !validAnimationSpeed(cfg.snapbackSpeed)) {
     cfg.snapbackSpeed = 50;
   }
-  if (cfg.hasOwnProperty('snapSpeed') !== true ||
-      validAnimationSpeed(cfg.snapSpeed) !== true) {
+  if (!cfg.hasOwnProperty('snapSpeed') ||
+      !validAnimationSpeed(cfg.snapSpeed)) {
     cfg.snapSpeed = 25;
   }
-  if (cfg.hasOwnProperty('trashSpeed') !== true ||
-      validAnimationSpeed(cfg.trashSpeed) !== true) {
+  if (!cfg.hasOwnProperty('trashSpeed') ||
+      !validAnimationSpeed(cfg.trashSpeed)) {
     cfg.trashSpeed = 100;
   }
 
   // make sure position is valid
-  if (cfg.hasOwnProperty('position') === true) {
+  if (cfg.hasOwnProperty('position')) {
     if (cfg.position === 'start') {
       CURRENT_POSITION = deepCopy(START_POSITION);
     }
 
-    else if (validFen(cfg.position) === true) {
+    else if (validFen(cfg.position)) {
       CURRENT_POSITION = fenToObj(cfg.position);
     }
 
-    else if (validPositionObject(cfg.position) === true) {
+    else if (validPositionObject(cfg.position)) {
       CURRENT_POSITION = deepCopy(cfg.position);
     }
 
@@ -499,53 +419,6 @@ function expandConfig() {
   return true;
 }
 
-//------------------------------------------------------------------------------
-// DOM Misc
-//------------------------------------------------------------------------------
-
-// calculates square size based on the width of the container
-// got a little CSS black magic here, so let me explain:
-// get the width of the container element (could be anything), reduce by 1 for
-// fudge factor, and then keep reducing until we find an exact mod 8 for
-// our square size
-function calculateSquareSize() {
-  var containerWidth = parseInt(containerEl.css('width'), 10);
-
-  // defensive, prevent infinite loop
-  if (! containerWidth || containerWidth <= 0) {
-    return 0;
-  }
-
-  // pad one pixel
-  var boardWidth = containerWidth - 1;
-
-  while (boardWidth % 8 !== 0 && boardWidth > 0) {
-    boardWidth--;
-  }
-
-  return (boardWidth / 8);
-}
-
-// create random IDs for elements
-function createElIds() {
-  // squares on the board
-  for (var i = 0; i < COLUMNS.length; i++) {
-    for (var j = 1; j <= 8; j++) {
-      var square = COLUMNS[i] + j;
-      SQUARE_ELS_IDS[square] = square + '-' + createId();
-    }
-  }
-
-  // spare pieces
-  var pieces = 'KQRBNP'.split('');
-  for (var i = 0; i < pieces.length; i++) {
-    var whitePiece = 'w' + pieces[i];
-    var blackPiece = 'b' + pieces[i];
-    SPARE_PIECE_ELS_IDS[whitePiece] = whitePiece + '-' + createId();
-    SPARE_PIECE_ELS_IDS[blackPiece] = blackPiece + '-' + createId();
-  }
-}
-
 //------------------------------------------------------------------------------
 // Markup Building
 //------------------------------------------------------------------------------
@@ -553,39 +426,13 @@ function createElIds() {
 function buildBoardContainer() {
   var html = '<div class="' + CSS.chessboard + '">';
 
-  if (cfg.sparePieces === true) {
-    html += '<div class="' + CSS.sparePieces + ' ' +
-      CSS.sparePiecesTop + '"></div>';
-  }
-
   html += '<div class="' + CSS.board + '"></div>';
 
-  if (cfg.sparePieces === true) {
-    html += '<div class="' + CSS.sparePieces + ' ' +
-      CSS.sparePiecesBottom + '"></div>';
-  }
-
   html += '</div>';
 
   return html;
 }
 
-/*
-var buildSquare = function(color, size, id) {
-  var html = '<div class="' + CSS.square + ' ' + CSSColor[color] + '" ' +
-  'style="width: ' + size + 'px; height: ' + size + 'px" ' +
-  'id="' + id + '">';
-
-  if (cfg.showNotation === true) {
-
-  }
-
-  html += '</div>';
-
-  return html;
-};
-*/
-
 function buildBoard(orientation) {
   if (orientation !== 'black') {
     orientation = 'white';
@@ -603,27 +450,29 @@ function buildBoard(orientation) {
 
   var squareColor = 'white';
   for (var i = 0; i < 8; i++) {
-    html += '<div class="' + CSS.row + '">';
     for (var j = 0; j < 8; j++) {
       var square = alpha[j] + row;
 
       html += '<div class="' + CSS.square + ' ' + CSSColor[squareColor] + ' ' +
         'square-' + square + '" ' +
-        'style="width: ' + SQUARE_SIZE + 'px; height: ' + SQUARE_SIZE + 'px" ' +
-        'id="' + SQUARE_ELS_IDS[square] + '" ' +
+        'style="grid-row: ' + (i+1) + '; grid-column: ' + (j+1) + ';" ' +
         'data-square="' + square + '">';
 
-      if (cfg.showNotation === true) {
+      if (cfg.showNotation) {
         // alpha notation
         if ((orientation === 'white' && row === 1) ||
             (orientation === 'black' && row === 8)) {
-          html += '<div class="' + CSS.notation + ' ' + CSS.alpha + '">' +
+          let bottom = 'calc(' + (12.5 * (7-i)) + '% + 1px)';
+          let right = 'calc(' + (12.5 * (7-j)) + '% + 3px)';
+          html += '<div class="' + CSS.alpha + '" style="right: ' + right + '; bottom: ' + bottom + ';">' +
             alpha[j] + '</div>';
         }
 
         // numeric notation
         if (j === 0) {
-          html += '<div class="' + CSS.notation + ' ' + CSS.numeric + '">' +
+          let top = 'calc(' + (12.5 * i) + '% + 2px)';
+          let left = 'calc(' + (12.5 * j) + '% + 2px)';
+          html += '<div class="' + CSS.numeric + '" style="top: ' + top + '; left: ' + left + ';">' +
             row + '</div>';
         }
       }
@@ -632,7 +481,6 @@ function buildBoard(orientation) {
 
       squareColor = (squareColor === 'white' ? 'black' : 'white');
     }
-    html += '<div class="' + CSS.clearfix + '"></div></div>';
 
     squareColor = (squareColor === 'white' ? 'black' : 'white');
 
@@ -664,174 +512,148 @@ function buildPieceImgSrc(piece) {
 /**
  * @param {!string} piece
  * @param {boolean=} hidden
- * @param {!string=} id
  */
-function buildPiece(piece, hidden, id) {
-  var html = '<img src="' + buildPieceImgSrc(piece) + '" ';
-  if (id && typeof id === 'string') {
-    html += 'id="' + id + '" ';
-  }
-  html += 'alt="" ' +
-  'class="' + CSS.piece + '" ' +
-  'data-piece="' + piece + '" ' +
-  'style="width: ' + SQUARE_SIZE + 'px;' +
-  'height: ' + SQUARE_SIZE + 'px;';
+function buildPiece(piece, hidden) {
+  let img = document.createElement('img');
+  img.src = buildPieceImgSrc(piece);
+  img.setAttribute('alt', '');
+  img.classList.add(CSS.piece);
   if (hidden === true) {
-    html += 'display:none;';
+    img.style.display = 'none';
   }
-  html += '" />';
-
-  return html;
-}
-
-function buildSparePieces(color) {
-  var pieces = ['wK', 'wQ', 'wR', 'wB', 'wN', 'wP'];
-  if (color === 'black') {
-    pieces = ['bK', 'bQ', 'bR', 'bB', 'bN', 'bP'];
-  }
-
-  var html = '';
-  for (var i = 0; i < pieces.length; i++) {
-    html += buildPiece(pieces[i], false, SPARE_PIECE_ELS_IDS[pieces[i]]);
-  }
-
-  return html;
+  return img;
 }
 
 //------------------------------------------------------------------------------
 // Animations
 //------------------------------------------------------------------------------
 
-function animateSquareToSquare(src, dest, piece, completeFn) {
-  // get information about the source and destination squares
-  var srcSquareEl = $('#' + SQUARE_ELS_IDS[src]);
-  var srcSquarePosition = srcSquareEl.offset();
-  var destSquareEl = $('#' + SQUARE_ELS_IDS[dest]);
-  var destSquarePosition = destSquareEl.offset();
-
-  // create the animated piece and absolutely position it
-  // over the source square
-  var animatedPieceId = createId();
-  $('body').append(buildPiece(piece, true, animatedPieceId));
-  var animatedPieceEl = $('#' + animatedPieceId);
-  animatedPieceEl.css({
-    display: '',
-    position: 'absolute',
-    top: srcSquarePosition.top,
-    left: srcSquarePosition.left
-  });
-
-  // remove original piece from source square
-  srcSquareEl.find('.' + CSS.piece).remove();
-
-  // on complete
-  var complete = function() {
-    // add the "real" piece to the destination square
-    destSquareEl.append(buildPiece(piece));
-
-    // remove the animated piece
-    animatedPieceEl.remove();
-
-    // run complete function
-    if (typeof completeFn === 'function') {
-      completeFn();
-    }
-  };
-
-  // animate the piece to the destination square
-  var opts = {
-    duration: cfg.moveSpeed,
-    complete: complete
+function offset(el) {  // From https://youmightnotneedjquery.com/.
+  let box = el.getBoundingClientRect();
+  let docElem = document.documentElement;
+  return {
+    top: box.top + window.pageYOffset - docElem.clientTop,
+    left: box.left + window.pageXOffset - docElem.clientLeft
   };
-  animatedPieceEl.animate(destSquarePosition, opts);
 }
 
-function animateSparePieceToSquare(piece, dest, completeFn) {
-  var srcOffset = $('#' + SPARE_PIECE_ELS_IDS[piece]).offset();
-  var destSquareEl = $('#' + SQUARE_ELS_IDS[dest]);
-  var destOffset = destSquareEl.offset();
-
-  // create the animate piece
-  var pieceId = createId();
-  $('body').append(buildPiece(piece, true, pieceId));
-  var animatedPieceEl = $('#' + pieceId);
-  animatedPieceEl.css({
-    display: '',
-    position: 'absolute',
-    left: srcOffset.left,
-    top: srcOffset.top
-  });
-
-  // on complete
-  var complete = function() {
-    // add the "real" piece to the destination square
-    destSquareEl.find('.' + CSS.piece).remove();
-    destSquareEl.append(buildPiece(piece));
-
-    // remove the animated piece
-    animatedPieceEl.remove();
-
-    // run complete function
-    if (typeof completeFn === 'function') {
-      completeFn();
-    }
-  };
-
-  // animate the piece to the destination square
-  var opts = {
-    duration: cfg.moveSpeed,
-    complete: complete
+function findSquarePosition(square) {
+  let s1 = square.split('');
+  var s1x = COLUMNS.indexOf(s1[0]);
+  var s1y = parseInt(s1[1], 10) - 1;
+  if (CURRENT_ORIENTATION === 'white') {
+    s1y = 7 - s1y;
+  }
+  return {
+    top: (s1y * 12.5) + '%',
+    left: (s1x * 12.5) + '%',
   };
-  animatedPieceEl.animate(destOffset, opts);
 }
 
 // execute an array of animations
 function doAnimations(a, oldPos, newPos) {
-  ANIMATION_HAPPENING = true;
-
-  var numFinished = 0;
-  function onFinish() {
-    numFinished++;
-
-    // exit if all the animations aren't finished
-    if (numFinished !== a.length) return;
-
-    drawPositionInstant();
-    ANIMATION_HAPPENING = false;
-
-    // run their onMoveEnd function
-    if (cfg.hasOwnProperty('onMoveEnd') === true &&
-      typeof cfg.onMoveEnd === 'function') {
-      cfg.onMoveEnd(deepCopy(oldPos), deepCopy(newPos));
-    }
-  }
+  let fadeout_pieces = [];
+  let fadein_pieces = [];
+  let move_pieces = [];
+  let squares_to_clear = [];
+  let squares_to_fill = {};
+  let removed_pieces = [];
 
   for (var i = 0; i < a.length; i++) {
     // clear a piece
     if (a[i].type === 'clear') {
-      $('#' + SQUARE_ELS_IDS[a[i].square] + ' .' + CSS.piece)
-        .fadeOut(cfg.trashSpeed, onFinish);
-    }
-
-    // add a piece (no spare pieces)
-    if (a[i].type === 'add' && cfg.sparePieces !== true) {
-      $('#' + SQUARE_ELS_IDS[a[i].square])
-        .append(buildPiece(a[i].piece, true))
-        .find('.' + CSS.piece)
-        .fadeIn(cfg.appearSpeed, onFinish);
+      let square = a[i].square;
+      let piece = PIECE_ON_SQUARE[square];
+      if (piece) {
+        fadeout_pieces.push(piece);
+        squares_to_clear.push(square);
+        removed_pieces.push(piece);
+      }
     }
 
-    // add a piece from a spare piece
-    if (a[i].type === 'add' && cfg.sparePieces === true) {
-      animateSparePieceToSquare(a[i].piece, a[i].square, onFinish);
+    // add a piece
+    if (a[i].type === 'add') {
+      let square = a[i].square;
+      let pos = findSquarePosition(square);
+      let piece = buildPiece(a[i].piece, true);
+      piece.style.left = pos.left;
+      piece.style.top = pos.top;
+      boardEl.append(piece);
+      squares_to_fill[square] = piece;
+      fadein_pieces.push(piece);
     }
 
     // move a piece
     if (a[i].type === 'move') {
-      animateSquareToSquare(a[i].source, a[i].destination, a[i].piece,
-        onFinish);
+      let piece = PIECE_ON_SQUARE[a[i].source];
+      move_pieces.push([piece, a[i].destination]);
+      squares_to_clear.push(a[i].source);
+      squares_to_fill[a[i].destination] = piece;
+
+      // This is O(n²), but OK.
+      let replaced_piece = PIECE_ON_SQUARE[a[i].destination];
+      if (replaced_piece && !a.some(e => e.type === 'move' && e.source === a[i].destination)) {
+        removed_pieces.push(replaced_piece);
+      }
     }
   }
+
+  for (const square of squares_to_clear) {
+    delete PIECE_ON_SQUARE[square];
+  }
+  for (const [square, piece] of Object.entries(squares_to_fill)) {
+    PIECE_ON_SQUARE[square] = piece;
+    piece.setAttribute('data-square', square);
+  }
+
+  var numFinished = 0;
+  function onFinish(e, opt_force) {
+    if (++numFinished === a.length) {
+      for (let piece of removed_pieces) {
+        piece.remove();
+      }
+
+      // run their onMoveEnd function
+      if (cfg.hasOwnProperty('onMoveEnd') &&
+        typeof cfg.onMoveEnd === 'function') {
+        cfg.onMoveEnd(deepCopy(oldPos), deepCopy(newPos));
+      }
+    }
+  }
+
+  fadein_pieces.forEach((piece) => {
+    piece.style.display = null;
+    piece.style.opacity = 1;
+    piece.animate(
+      [ { opacity: 0 }, { opacity: 1 } ],
+      { duration: cfg.appearSpeed }
+    ).addEventListener('finish', onFinish);
+  });
+  fadeout_pieces.forEach((piece) => {
+    piece.style.display = null;
+    piece.style.opacity = 0;
+    piece.animate(
+      [ { opacity: 1 }, { opacity: 0 } ],
+      { duration: cfg.trashSpeed }
+    ).addEventListener('finish', onFinish);
+  });
+  for (const [piece, destination] of move_pieces) {
+    // Move it to the end of the stack, which changes the implicit z-index
+    // so that it will go on top of any pieces it's replacing.
+    piece.remove();
+    boardEl.appendChild(piece);
+
+    let destSquarePosition = findSquarePosition(destination);
+    piece.animate(
+      [
+        { top: piece.style.top, left: piece.style.left },
+        { top: destSquarePosition.top, left: destSquarePosition.left }
+      ],
+      { duration: cfg.moveSpeed }
+    ).addEventListener('finish', onFinish);
+    piece.style.top = destSquarePosition.top;
+    piece.style.left = destSquarePosition.left;
+  }
 }
 
 // returns the distance between two squares
@@ -851,55 +673,26 @@ function squareDistance(s1, s2) {
   return yDelta;
 }
 
-// returns an array of closest squares from square
-function createRadius(square) {
-  var squares = [];
-
-  // calculate distance of all squares
-  for (var i = 0; i < 8; i++) {
-    for (var j = 0; j < 8; j++) {
-      var s = COLUMNS[i] + (j + 1);
-
-      // skip the square we're starting from
-      if (square === s) continue;
-
-      squares.push({
-        square: s,
-        distance: squareDistance(square, s)
-      });
-    }
-  }
-
-  // sort by distance
-  squares.sort(function(a, b) {
-    return a.distance - b.distance;
-  });
-
-  // just return the square code
-  var squares2 = [];
-  for (var i = 0; i < squares.length; i++) {
-    squares2.push(squares[i].square);
-  }
-
-  return squares2;
-}
-
 // returns the square of the closest instance of piece
 // returns false if no instance of piece is found in position
 function findClosestPiece(position, piece, square) {
-  // create array of closest squares from square
-  var closestSquares = createRadius(square);
-
-  // search through the position in order of distance for the piece
-  for (var i = 0; i < closestSquares.length; i++) {
-    var s = closestSquares[i];
+  let best_square = false;
+  let best_dist = 1e9;
+  for (var i = 0; i < COLUMNS.length; i++) {
+    for (var j = 1; j <= 8; j++) {
+      let other_square = COLUMNS[i] + j;
 
-    if (position.hasOwnProperty(s) === true && position[s] === piece) {
-      return s;
+      if (position[other_square] === piece && square != other_square) {
+        let dist = squareDistance(square, other_square);
+        if (dist < best_dist) {
+          best_square = other_square;
+          best_dist = dist;
+        }
+      }
     }
   }
 
-  return false;
+  return best_square;
 }
 
 // calculate an array of animations that need to happen in order to get
@@ -914,9 +707,9 @@ function calculateAnimations(pos1, pos2) {
 
   // remove pieces that are the same in both positions
   for (var i in pos2) {
-    if (pos2.hasOwnProperty(i) !== true) continue;
+    if (!pos2.hasOwnProperty(i)) continue;
 
-    if (pos1.hasOwnProperty(i) === true && pos1[i] === pos2[i]) {
+    if (pos1.hasOwnProperty(i) && pos1[i] === pos2[i]) {
       delete pos1[i];
       delete pos2[i];
     }
@@ -924,7 +717,7 @@ function calculateAnimations(pos1, pos2) {
 
   // find all the "move" animations
   for (var i in pos2) {
-    if (pos2.hasOwnProperty(i) !== true) continue;
+    if (!pos2.hasOwnProperty(i)) continue;
 
     var closestPiece = findClosestPiece(pos1, pos2[i], i);
     if (closestPiece !== false) {
@@ -943,7 +736,7 @@ function calculateAnimations(pos1, pos2) {
 
   // add pieces to pos2
   for (var i in pos2) {
-    if (pos2.hasOwnProperty(i) !== true) continue;
+    if (!pos2.hasOwnProperty(i)) continue;
 
     animations.push({
       type: 'add',
@@ -956,11 +749,11 @@ function calculateAnimations(pos1, pos2) {
 
   // clear pieces from pos1
   for (var i in pos1) {
-    if (pos1.hasOwnProperty(i) !== true) continue;
+    if (!pos1.hasOwnProperty(i)) continue;
 
     // do not clear a piece if it is on a square that is the result
     // of a "move", ie: a piece capture
-    if (squaresMovedTo.hasOwnProperty(i) === true) continue;
+    if (squaresMovedTo.hasOwnProperty(i)) continue;
 
     animations.push({
       type: 'clear',
@@ -980,30 +773,23 @@ function calculateAnimations(pos1, pos2) {
 
 function drawPositionInstant() {
   // clear the board
-  boardEl.find('.' + CSS.piece).remove();
+  boardEl.querySelectorAll('.' + CSS.piece).forEach((piece) => piece.remove());
 
   // add the pieces
-  for (var i in CURRENT_POSITION) {
-    if (CURRENT_POSITION.hasOwnProperty(i) !== true) continue;
-
-    $('#' + SQUARE_ELS_IDS[i]).append(buildPiece(CURRENT_POSITION[i]));
+  for (const [square, piece] of Object.entries(CURRENT_POSITION)) {
+    let pos = findSquarePosition(square);
+    let pieceEl = buildPiece(piece);
+    pieceEl.style.left = pos.left;
+    pieceEl.style.top = pos.top;
+    pieceEl.setAttribute('data-square', square);
+    boardEl.append(pieceEl);
+    PIECE_ON_SQUARE[square] = pieceEl;
   }
 }
 
 function drawBoard() {
-  boardEl.html(buildBoard(CURRENT_ORIENTATION));
+  boardEl.innerHTML = buildBoard(CURRENT_ORIENTATION);
   drawPositionInstant();
-
-  if (cfg.sparePieces === true) {
-    if (CURRENT_ORIENTATION === 'white') {
-      sparePiecesTopEl.html(buildSparePieces('black'));
-      sparePiecesBottomEl.html(buildSparePieces('white'));
-    }
-    else {
-      sparePiecesTopEl.html(buildSparePieces('white'));
-      sparePiecesBottomEl.html(buildSparePieces('black'));
-    }
-  }
 }
 
 // given a position and a set of moves, return a new position
@@ -1012,10 +798,10 @@ function calculatePositionFromMoves(position, moves) {
   position = deepCopy(position);
 
   for (var i in moves) {
-    if (moves.hasOwnProperty(i) !== true) continue;
+    if (!moves.hasOwnProperty(i)) continue;
 
     // skip the move if the position doesn't have a piece on the source square
-    if (position.hasOwnProperty(i) !== true) continue;
+    if (!position.hasOwnProperty(i)) continue;
 
     var piece = position[i];
     delete position[i];
@@ -1035,7 +821,7 @@ function setCurrentPosition(position) {
   if (oldFen === newFen) return;
 
   // run their onChange function
-  if (cfg.hasOwnProperty('onChange') === true &&
+  if (cfg.hasOwnProperty('onChange') &&
     typeof cfg.onChange === 'function') {
     cfg.onChange(oldPos, newPos);
   }
@@ -1044,52 +830,22 @@ function setCurrentPosition(position) {
   CURRENT_POSITION = position;
 }
 
-function isXYOnSquare(x, y) {
-  for (var i in SQUARE_ELS_OFFSETS) {
-    if (SQUARE_ELS_OFFSETS.hasOwnProperty(i) !== true) continue;
-
-    var s = SQUARE_ELS_OFFSETS[i];
-    if (x >= s.left && x < s.left + SQUARE_SIZE &&
-        y >= s.top && y < s.top + SQUARE_SIZE) {
-      return i;
-    }
-  }
-
-  return 'offboard';
-}
-
-// records the XY coords of every square into memory
-function captureSquareOffsets() {
-  SQUARE_ELS_OFFSETS = {};
-
-  for (var i in SQUARE_ELS_IDS) {
-    if (SQUARE_ELS_IDS.hasOwnProperty(i) !== true) continue;
-
-    SQUARE_ELS_OFFSETS[i] = $('#' + SQUARE_ELS_IDS[i]).offset();
-  }
-}
-
 function removeSquareHighlights() {
-  boardEl.find('.' + CSS.square)
-    .removeClass(CSS.highlight1 + ' ' + CSS.highlight2);
+  boardEl.querySelectorAll('.' + CSS.square).forEach((piece) => {
+    piece.classList.remove(CSS.highlight1);
+    piece.classList.remove(CSS.highlight2);
+  });
 }
 
 function snapbackDraggedPiece() {
-  // there is no "snapback" for spare pieces
-  if (DRAGGED_PIECE_SOURCE === 'spare') {
-    trashDraggedPiece();
-    return;
-  }
-
   removeSquareHighlights();
 
   // animation complete
   function complete() {
     drawPositionInstant();
-    draggedPieceEl.css('display', 'none');
 
     // run their onSnapbackEnd function
-    if (cfg.hasOwnProperty('onSnapbackEnd') === true &&
+    if (cfg.hasOwnProperty('onSnapbackEnd') &&
       typeof cfg.onSnapbackEnd === 'function') {
       cfg.onSnapbackEnd(DRAGGED_PIECE, DRAGGED_PIECE_SOURCE,
         deepCopy(CURRENT_POSITION), CURRENT_ORIENTATION);
@@ -1097,71 +853,71 @@ function snapbackDraggedPiece() {
   }
 
   // get source square position
-  var sourceSquarePosition =
-    $('#' + SQUARE_ELS_IDS[DRAGGED_PIECE_SOURCE]).offset();
+  var sourceSquarePosition = findSquarePosition(DRAGGED_PIECE_SOURCE);
 
   // animate the piece to the target square
-  var opts = {
-    duration: cfg.snapbackSpeed,
-    complete: complete
-  };
-  draggedPieceEl.animate(sourceSquarePosition, opts);
+  DRAGGED_PIECE.animate(
+    [
+      { top: DRAGGED_PIECE.style.top, left: DRAGGED_PIECE.style.left },
+      { top: sourceSquarePosition.top, left: sourceSquarePosition.left }
+    ],
+    { duration: cfg.snapbackSpeed }
+  ).addEventListener('finish', complete);
+  DRAGGED_PIECE.style.top = sourceSquarePosition.top;
+  DRAGGED_PIECE.style.left = sourceSquarePosition.left;
 
   // set state
   DRAGGING_A_PIECE = false;
 }
 
-function trashDraggedPiece() {
+function dropDraggedPieceOnSquare(square) {
   removeSquareHighlights();
-
-  // remove the source piece
-  var newPosition = deepCopy(CURRENT_POSITION);
-  delete newPosition[DRAGGED_PIECE_SOURCE];
-  setCurrentPosition(newPosition);
-
-  // redraw the position
-  drawPositionInstant();
-
-  // hide the dragged piece
-  draggedPieceEl.fadeOut(cfg.trashSpeed);
-
-  // set state
   DRAGGING_A_PIECE = false;
-}
 
-function dropDraggedPieceOnSquare(square) {
-  removeSquareHighlights();
+  if (DRAGGED_PIECE_SOURCE === square) {
+    // Nothing to do, but call onSnapEnd anyway
+    if (cfg.hasOwnProperty('onSnapEnd') && typeof cfg.onSnapEnd === 'function') {
+      cfg.onSnapEnd(DRAGGED_PIECE_SOURCE, square, DRAGGED_PIECE);
+    }
+    return;
+  }
 
   // update position
   var newPosition = deepCopy(CURRENT_POSITION);
+  newPosition[square] = newPosition[DRAGGED_PIECE_SOURCE];
   delete newPosition[DRAGGED_PIECE_SOURCE];
-  newPosition[square] = DRAGGED_PIECE;
   setCurrentPosition(newPosition);
 
+  delete PIECE_ON_SQUARE[DRAGGED_PIECE_SOURCE];
+  PIECE_ON_SQUARE[square] = DRAGGED_PIECE;
+  DRAGGED_PIECE.setAttribute('data-square', square);
+
   // get target square information
-  var targetSquarePosition = $('#' + SQUARE_ELS_IDS[square]).offset();
+  var targetSquarePosition = findSquarePosition(square);
 
   // animation complete
   var complete = function() {
     drawPositionInstant();
-    draggedPieceEl.css('display', 'none');
 
     // execute their onSnapEnd function
-    if (cfg.hasOwnProperty('onSnapEnd') === true &&
+    if (cfg.hasOwnProperty('onSnapEnd') &&
       typeof cfg.onSnapEnd === 'function') {
-      cfg.onSnapEnd(DRAGGED_PIECE_SOURCE, square, DRAGGED_PIECE);
+      requestAnimationFrame(() => {  // HACK: so that we don't add event handlers from the callback...
+        cfg.onSnapEnd(DRAGGED_PIECE_SOURCE, square, DRAGGED_PIECE);
+      });
     }
   };
 
   // snap the piece to the target square
-  var opts = {
-    duration: cfg.snapSpeed,
-    complete: complete
-  };
-  draggedPieceEl.animate(targetSquarePosition, opts);
-
-  // set state
-  DRAGGING_A_PIECE = false;
+  DRAGGED_PIECE.animate(
+    [
+      { top: DRAGGED_PIECE.style.top, left: DRAGGED_PIECE.style.left },
+      { top: targetSquarePosition.top, left: targetSquarePosition.left }
+    ],
+    { duration: cfg.snapSpeed }
+  ).addEventListener('finish', complete);
+  DRAGGED_PIECE.style.top = targetSquarePosition.top;
+  DRAGGED_PIECE.style.left = targetSquarePosition.left;
 }
 
 function beginDraggingPiece(source, piece, x, y) {
@@ -1175,58 +931,60 @@ function beginDraggingPiece(source, piece, x, y) {
 
   // set state
   DRAGGING_A_PIECE = true;
-  DRAGGED_PIECE = piece;
+  DRAGGED_PIECE = PIECE_ON_SQUARE[source];
   DRAGGED_PIECE_SOURCE = source;
+  DRAGGED_PIECE_LOCATION = source;
 
-  // if the piece came from spare pieces, location is offboard
-  if (source === 'spare') {
-    DRAGGED_PIECE_LOCATION = 'offboard';
-  }
-  else {
-    DRAGGED_PIECE_LOCATION = source;
-  }
+  // Move it to the end of the stack, which changes the implicit z-index
+  // so that it will go on top of any pieces it's replacing.
+  DRAGGED_PIECE.remove();
+  boardEl.appendChild(DRAGGED_PIECE);
 
-  // capture the x, y coords of all squares in memory
-  captureSquareOffsets();
+  // highlight the source square
+  let square = document.querySelector('.' + CSS.square + '[data-square="' + source + '"]');
+  square.classList.add(CSS.highlight1);
+}
 
-  // create the dragged piece
-  draggedPieceEl.attr('src', buildPieceImgSrc(piece))
-    .css({
-      display: '',
-      position: 'absolute',
-      left: x - (SQUARE_SIZE / 2),
-      top: y - (SQUARE_SIZE / 2)
-    });
+function findSquareFromEvent(pageX, pageY) {
+  let o = offset(boardEl);
+  let x = pageX - o.left;
+  let y = pageY - o.top;
 
-  if (source !== 'spare') {
-    // highlight the source square and hide the piece
-    $('#' + SQUARE_ELS_IDS[source]).addClass(CSS.highlight1)
-      .find('.' + CSS.piece).css('display', 'none');
+  let position = {
+    x: x,
+    y: y,
+    left: Math.floor(x * 8 / boardEl.getBoundingClientRect().width),
+    top: Math.floor(y * 8 / boardEl.getBoundingClientRect().width)
+  };
+  if (CURRENT_ORIENTATION === 'white') {
+    position.top = 7 - position.top;
   }
+  if (position.left >= 0 && position.left < 8 && position.top >= 0 && position.top < 8) {
+    position.square = COLUMNS[position.left] + (position.top + 1);
+  } else {
+    position.square = 'offboard';
+  }
+  return position;
 }
 
-function updateDraggedPiece(x, y) {
+function updateDraggedPiece(position) {
   // put the dragged piece over the mouse cursor
-  draggedPieceEl.css({
-    left: x - (SQUARE_SIZE / 2),
-    top: y - (SQUARE_SIZE / 2)
-  });
-
-  // get location
-  var location = isXYOnSquare(x, y);
+  DRAGGED_PIECE.style.left = 'calc(' + position.x + 'px - 6.25%)';
+  DRAGGED_PIECE.style.top = 'calc(' + position.y + 'px - 6.25%)';
 
   // do nothing if the location has not changed
-  if (location === DRAGGED_PIECE_LOCATION) return;
+  if (position === DRAGGED_PIECE_LOCATION) return;
 
   // remove highlight from previous square
-  if (validSquare(DRAGGED_PIECE_LOCATION) === true) {
-    $('#' + SQUARE_ELS_IDS[DRAGGED_PIECE_LOCATION])
-      .removeClass(CSS.highlight2);
+  if (validSquare(DRAGGED_PIECE_LOCATION)) {
+    document.querySelector('.' + CSS.square + '[data-square="' + DRAGGED_PIECE_LOCATION + '"]')
+      .classList.remove(CSS.highlight2);
   }
 
   // add highlight to new square
-  if (validSquare(location) === true) {
-    $('#' + SQUARE_ELS_IDS[location]).addClass(CSS.highlight2);
+  if (validSquare(position.square)) {
+    document.querySelector('.' + CSS.square + '[data-square="' + position.square + '"]')
+      .classList.add(CSS.highlight2);
   }
 
   // run onDragMove
@@ -1237,53 +995,39 @@ function updateDraggedPiece(x, y) {
   }
 
   // update state
-  DRAGGED_PIECE_LOCATION = location;
+  DRAGGED_PIECE_LOCATION = position.square;
 }
 
 function stopDraggedPiece(location) {
   // determine what the action should be
   var action = 'drop';
-  if (location === 'offboard' && cfg.dropOffBoard === 'snapback') {
+  if (location.square === 'offboard' && cfg.dropOffBoard === 'snapback') {
     action = 'snapback';
   }
-  if (location === 'offboard' && cfg.dropOffBoard === 'trash') {
-    action = 'trash';
-  }
 
   // run their onDrop function, which can potentially change the drop action
-  if (cfg.hasOwnProperty('onDrop') === true &&
+  if (cfg.hasOwnProperty('onDrop') &&
     typeof cfg.onDrop === 'function') {
     var newPosition = deepCopy(CURRENT_POSITION);
 
-    // source piece is a spare piece and position is off the board
-    //if (DRAGGED_PIECE_SOURCE === 'spare' && location === 'offboard') {...}
-    // position has not changed; do nothing
-
-    // source piece is a spare piece and position is on the board
-    if (DRAGGED_PIECE_SOURCE === 'spare' && validSquare(location) === true) {
-      // add the piece to the board
-      newPosition[location] = DRAGGED_PIECE;
-    }
-
-    // source piece was on the board and position is off the board
-    if (validSquare(DRAGGED_PIECE_SOURCE) === true && location === 'offboard') {
-      // remove the piece from the board
-      delete newPosition[DRAGGED_PIECE_SOURCE];
-    }
-
     // source piece was on the board and position is on the board
-    if (validSquare(DRAGGED_PIECE_SOURCE) === true &&
-      validSquare(location) === true) {
+    if (validSquare(DRAGGED_PIECE_SOURCE) &&
+      validSquare(location.square)) {
       // move the piece
       delete newPosition[DRAGGED_PIECE_SOURCE];
-      newPosition[location] = DRAGGED_PIECE;
+      newPosition[location.square] = DRAGGED_PIECE;
+      if (location.square !== DRAGGED_PIECE_SOURCE) {
+        PIECE_ON_SQUARE[location.square] = PIECE_ON_SQUARE[DRAGGED_PIECE_SOURCE];
+        DRAGGED_PIECE.setAttribute('data-square', location.square);
+        delete PIECE_ON_SQUARE[DRAGGED_PIECE_SOURCE];
+      }
     }
 
     var oldPosition = deepCopy(CURRENT_POSITION);
 
-    var result = cfg.onDrop(DRAGGED_PIECE_SOURCE, location, DRAGGED_PIECE,
+    var result = cfg.onDrop(DRAGGED_PIECE_SOURCE, location.square, DRAGGED_PIECE,
       newPosition, oldPosition, CURRENT_ORIENTATION);
-    if (result === 'snapback' || result === 'trash') {
+    if (result === 'snapback') {
       action = result;
     }
   }
@@ -1292,11 +1036,8 @@ function stopDraggedPiece(location) {
   if (action === 'snapback') {
     snapbackDraggedPiece();
   }
-  else if (action === 'trash') {
-    trashDraggedPiece();
-  }
   else if (action === 'drop') {
-    dropDraggedPieceOnSquare(location);
+    dropDraggedPieceOnSquare(location.square);
   }
 }
 
@@ -1323,11 +1064,8 @@ widget.config = function(arg1, arg2) {
 // remove the widget from the page
 widget.destroy = function() {
   // remove markup
-  containerEl.html('');
+  containerEl.innerHTML = '';
   draggedPieceEl.remove();
-
-  // remove event handlers
-  containerEl.unbind();
 };
 
 // shorthand method to get the current FEN
@@ -1364,7 +1102,7 @@ widget.move = function() {
     }
 
     // skip invalid arguments
-    if (validMove(arguments[i]) !== true) {
+    if (!validMove(arguments[i])) {
       error(2826, 'Invalid move passed to the move method.', arguments[i]);
       continue;
     }
@@ -1432,17 +1170,17 @@ widget.position = function(position, useAnimation) {
   }
 
   // convert FEN to position object
-  if (validFen(position) === true) {
+  if (validFen(position)) {
     position = fenToObj(position);
   }
 
   // validate position object
-  if (validPositionObject(position) !== true) {
+  if (!validPositionObject(position)) {
     error(6482, 'Invalid value passed to the position method.', position);
     return;
   }
 
-  if (useAnimation === true) {
+  if (useAnimation) {
     // start the animations
     doAnimations(calculateAnimations(CURRENT_POSITION, position),
       CURRENT_POSITION, position);
@@ -1458,24 +1196,6 @@ widget.position = function(position, useAnimation) {
 };
 
 widget.resize = function() {
-  // calulate the new square size
-  SQUARE_SIZE = calculateSquareSize();
-
-  // set board width
-  boardEl.css('width', (SQUARE_SIZE * 8) + 'px');
-
-  // set drag piece size
-  draggedPieceEl.css({
-    height: SQUARE_SIZE,
-    width: SQUARE_SIZE
-  });
-
-  // spare pieces
-  if (cfg.sparePieces === true) {
-    containerEl.find('.' + CSS.sparePieces)
-      .css('paddingLeft', (SQUARE_SIZE + BOARD_BORDER_SIZE) + 'px');
-  }
-
   // redraw the board
   drawBoard();
 };
@@ -1493,124 +1213,97 @@ function isTouchDevice() {
   return ('ontouchstart' in document.documentElement);
 }
 
-// reference: http://www.quirksmode.org/js/detect.html
-function isMSIE() {
-  return (navigator && navigator.userAgent &&
-      navigator.userAgent.search(/MSIE/) !== -1);
-}
-
-function stopDefault(e) {
-  e.preventDefault();
-}
-
 function mousedownSquare(e) {
-  // do nothing if we're not draggable
-  if (cfg.draggable !== true) return;
-
-  var square = $(this).attr('data-square');
+  let square = e.target.getAttribute('data-square');
 
   // no piece on this square
-  if (validSquare(square) !== true ||
-      CURRENT_POSITION.hasOwnProperty(square) !== true) {
+  if (!validSquare(square) ||
+      !CURRENT_POSITION.hasOwnProperty(square)) {
     return;
   }
 
+  // do nothing if we're not draggable
+  if (!cfg.draggable) return;
+
   beginDraggingPiece(square, CURRENT_POSITION[square], e.pageX, e.pageY);
 }
 
 function touchstartSquare(e) {
+  let target = e.target.closest('.' + CSS.square);
+  if (!target) {
+    return;
+  }
+
   // do nothing if we're not draggable
-  if (cfg.draggable !== true) return;
+  if (!cfg.draggable) return;
 
-  var square = $(this).attr('data-square');
+  var square = target.getAttribute('data-square');
 
   // no piece on this square
-  if (validSquare(square) !== true ||
-      CURRENT_POSITION.hasOwnProperty(square) !== true) {
+  if (!validSquare(square) ||
+      !CURRENT_POSITION.hasOwnProperty(square)) {
     return;
   }
 
-  e = e.originalEvent;
   beginDraggingPiece(square, CURRENT_POSITION[square],
     e.changedTouches[0].pageX, e.changedTouches[0].pageY);
 }
 
-function mousedownSparePiece(e) {
-  // do nothing if sparePieces is not enabled
-  if (cfg.sparePieces !== true) return;
-
-  var piece = $(this).attr('data-piece');
-
-  beginDraggingPiece('spare', piece, e.pageX, e.pageY);
-}
-
-function touchstartSparePiece(e) {
-  // do nothing if sparePieces is not enabled
-  if (cfg.sparePieces !== true) return;
-
-  var piece = $(this).attr('data-piece');
-
-  e = e.originalEvent;
-  beginDraggingPiece('spare', piece,
-    e.changedTouches[0].pageX, e.changedTouches[0].pageY);
-}
-
 function mousemoveWindow(e) {
   // do nothing if we are not dragging a piece
-  if (DRAGGING_A_PIECE !== true) return;
+  if (!DRAGGING_A_PIECE) return;
 
-  updateDraggedPiece(e.pageX, e.pageY);
+  updateDraggedPiece(findSquareFromEvent(e.pageX, e.pageY));
 }
 
 function touchmoveWindow(e) {
   // do nothing if we are not dragging a piece
-  if (DRAGGING_A_PIECE !== true) return;
+  if (!DRAGGING_A_PIECE) return;
 
   // prevent screen from scrolling
   e.preventDefault();
 
-  updateDraggedPiece(e.originalEvent.changedTouches[0].pageX,
-    e.originalEvent.changedTouches[0].pageY);
+  updateDraggedPiece(findSquareFromEvent(e.changedTouches[0].pageX,
+    e.changedTouches[0].pageY));
 }
 
 function mouseupWindow(e) {
   // do nothing if we are not dragging a piece
-  if (DRAGGING_A_PIECE !== true) return;
+  if (!DRAGGING_A_PIECE) return;
 
-  // get the location
-  var location = isXYOnSquare(e.pageX, e.pageY);
-
-  stopDraggedPiece(location);
+  stopDraggedPiece(findSquareFromEvent(e.pageX, e.pageY));
 }
 
 function touchendWindow(e) {
   // do nothing if we are not dragging a piece
-  if (DRAGGING_A_PIECE !== true) return;
-
-  // get the location
-  var location = isXYOnSquare(e.originalEvent.changedTouches[0].pageX,
-    e.originalEvent.changedTouches[0].pageY);
+  if (!DRAGGING_A_PIECE) return;
 
-  stopDraggedPiece(location);
+  stopDraggedPiece(findSquareFromEvent(e.changedTouches[0].pageX,
+    e.changedTouches[0].pageY));
 }
 
 function mouseenterSquare(e) {
+  let target = e.target.closest('.' + CSS.square);
+  if (!target) {
+    return;
+  }
+
   // do not fire this event if we are dragging a piece
   // NOTE: this should never happen, but it's a safeguard
   if (DRAGGING_A_PIECE !== false) return;
 
-  if (cfg.hasOwnProperty('onMouseoverSquare') !== true ||
+  if (!cfg.hasOwnProperty('onMouseoverSquare') ||
     typeof cfg.onMouseoverSquare !== 'function') return;
 
   // get the square
-  var square = $(e.currentTarget).attr('data-square');
+  var square = target.getAttribute('data-square');
 
   // NOTE: this should never happen; defensive
-  if (validSquare(square) !== true) return;
+  if (!validSquare(square)) return;
 
   // get the piece on this square
   var piece = false;
-  if (CURRENT_POSITION.hasOwnProperty(square) === true) {
+  if (CURRENT_POSITION.hasOwnProperty(square)) {
     piece = CURRENT_POSITION[square];
   }
 
@@ -1620,22 +1313,27 @@ function mouseenterSquare(e) {
 }
 
 function mouseleaveSquare(e) {
+  let target = e.target.closest('.' + CSS.square);
+  if (!target) {
+    return;
+  }
+
   // do not fire this event if we are dragging a piece
   // NOTE: this should never happen, but it's a safeguard
   if (DRAGGING_A_PIECE !== false) return;
 
-  if (cfg.hasOwnProperty('onMouseoutSquare') !== true ||
+  if (!cfg.hasOwnProperty('onMouseoutSquare') ||
     typeof cfg.onMouseoutSquare !== 'function') return;
 
   // get the square
-  var square = $(e.currentTarget).attr('data-square');
+  var square = target.getAttribute('data-square');
 
   // NOTE: this should never happen; defensive
-  if (validSquare(square) !== true) return;
+  if (!validSquare(square)) return;
 
   // get the piece on this square
   var piece = false;
-  if (CURRENT_POSITION.hasOwnProperty(square) === true) {
+  if (CURRENT_POSITION.hasOwnProperty(square)) {
     piece = CURRENT_POSITION[square];
   }
 
@@ -1650,69 +1348,43 @@ function mouseleaveSquare(e) {
 
 function addEvents() {
   // prevent browser "image drag"
-  $('body').on('mousedown mousemove', '.' + CSS.piece, stopDefault);
+  let stopDefault = (e) => {
+    if (e.target.matches('.' + CSS.piece)) {
+      e.preventDefault();
+    }
+  };
+  document.body.addEventListener('mousedown', stopDefault);
+  document.body.addEventListener('mousemove', stopDefault);
 
   // mouse drag pieces
-  boardEl.on('mousedown', '.' + CSS.square, mousedownSquare);
-  containerEl.on('mousedown', '.' + CSS.sparePieces + ' .' + CSS.piece,
-    mousedownSparePiece);
+  boardEl.addEventListener('mousedown', mousedownSquare);
 
   // mouse enter / leave square
-  boardEl.on('mouseenter', '.' + CSS.square, mouseenterSquare);
-  boardEl.on('mouseleave', '.' + CSS.square, mouseleaveSquare);
+  boardEl.addEventListener('mouseenter', mouseenterSquare);
+  boardEl.addEventListener('mouseleave', mouseleaveSquare);
 
-  // IE doesn't like the events on the window object, but other browsers
-  // perform better that way
-  if (isMSIE() === true) {
-    // IE-specific prevent browser "image drag"
-    document.ondragstart = function() { return false; };
-
-    $('body').on('mousemove', mousemoveWindow);
-    $('body').on('mouseup', mouseupWindow);
-  }
-  else {
-    $(window).on('mousemove', mousemoveWindow);
-    $(window).on('mouseup', mouseupWindow);
-  }
+  window.addEventListener('mousemove', mousemoveWindow);
+  window.addEventListener('mouseup', mouseupWindow);
 
   // touch drag pieces
-  if (isTouchDevice() === true) {
-    boardEl.on('touchstart', '.' + CSS.square, touchstartSquare);
-    containerEl.on('touchstart', '.' + CSS.sparePieces + ' .' + CSS.piece,
-      touchstartSparePiece);
-    $(window).on('touchmove', touchmoveWindow);
-    $(window).on('touchend', touchendWindow);
+  if (isTouchDevice()) {
+    boardEl.addEventListener('touchstart', touchstartSquare);
+    window.addEventListener('touchmove', touchmoveWindow);
+    window.addEventListener('touchend', touchendWindow);
   }
 }
 
 function initDom() {
   // build board and save it in memory
-  containerEl.html(buildBoardContainer());
-  boardEl = containerEl.find('.' + CSS.board);
-
-  if (cfg.sparePieces === true) {
-    sparePiecesTopEl = containerEl.find('.' + CSS.sparePiecesTop);
-    sparePiecesBottomEl = containerEl.find('.' + CSS.sparePiecesBottom);
-  }
-
-  // create the drag piece
-  var draggedPieceId = createId();
-  $('body').append(buildPiece('wP', true, draggedPieceId));
-  draggedPieceEl = $('#' + draggedPieceId);
-
-  // get the border size
-  BOARD_BORDER_SIZE = parseInt(boardEl.css('borderLeftWidth'), 10);
+  containerEl.innerHTML = buildBoardContainer();
+  boardEl = containerEl.querySelector('.' + CSS.board);
 
   // set the size and draw the board
   widget.resize();
 }
 
 function init() {
-  if (checkDeps() !== true ||
-      expandConfig() !== true) return;
-
-  // create unique IDs for all the elements we will create
-  createElIds();
+  if (!checkDeps() || !expandConfig()) return;
 
   initDom();
   addEvents();
diff --git a/www/js/chessboard-0.3.0.min.js b/www/js/chessboard-0.3.0.min.js
deleted file mode 100644
index 81a29a1..0000000
--- a/www/js/chessboard-0.3.0.min.js
+++ /dev/null
@@ -1,31 +0,0 @@
-/*! chessboard.js v0.3.0 | (c) 2013 Chris Oakman | MIT License chessboardjs.com/license */
-(function(){function l(f){return"string"!==typeof f?!1:-1!==f.search(/^[a-h][1-8]$/)}function Q(f){if("string"!==typeof f)return!1;f=f.replace(/ .+$/,"");f=f.split("/");if(8!==f.length)return!1;for(var b=0;8>b;b++)if(""===f[b]||8<f[b].length||-1!==f[b].search(/[^kqrbnpKQRNBP1-8]/))return!1;return!0}function F(f){if("object"!==typeof f)return!1;for(var b in f)if(!0===f.hasOwnProperty(b)){var n;(n=!0!==l(b))||(n=f[b],n="string"!==typeof n?!1:-1!==n.search(/^[bw][KQRNBP]$/),n=!0!==n);if(n)return!1}return!0}
-function K(f){if(!0!==Q(f))return!1;f=f.replace(/ .+$/,"");f=f.split("/");for(var b={},n=8,m=0;8>m;m++){for(var l=f[m].split(""),r=0,w=0;w<l.length;w++)if(-1!==l[w].search(/[1-8]/))var I=parseInt(l[w],10),r=r+I;else{var I=b,F=B[r]+n,A;A=l[w];A=A.toLowerCase()===A?"b"+A.toUpperCase():"w"+A.toUpperCase();I[F]=A;r++}n--}return b}function L(f){if(!0!==F(f))return!1;for(var b="",n=8,m=0;8>m;m++){for(var l=0;8>l;l++){var r=B[l]+n;!0===f.hasOwnProperty(r)?(r=f[r].split(""),r="w"===r[0]?r[1].toUpperCase():
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diff --git a/www/js/jquery-deprecated-sizzle.js b/www/js/jquery-deprecated-sizzle.js
deleted file mode 100644
index 19d7d4d..0000000
--- a/www/js/jquery-deprecated-sizzle.js
+++ /dev/null
@@ -1,7281 +0,0 @@
-/*!
- * jQuery JavaScript Library v2.1.1 -deprecated,-css/hiddenVisibleSelectors,-effects/animatedSelector
- * http://jquery.com/
- *
- * Includes Sizzle.js
- * http://sizzlejs.com/
- *
- * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
- * Released under the MIT license
- * http://jquery.org/license
- *
- * Date: 2014-09-28T02:59Z
- */
-
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-
-	if ( typeof module === "object" && typeof module.exports === "object" ) {
-		// For CommonJS and CommonJS-like environments where a proper window is present,
-		// execute the factory and get jQuery
-		// For environments that do not inherently posses a window with a document
-		// (such as Node.js), expose a jQuery-making factory as module.exports
-		// This accentuates the need for the creation of a real window
-		// e.g. var jQuery = require("jquery")(window);
-		// See ticket #14549 for more info
-		module.exports = global.document ?
-			factory( global, true ) :
-			function( w ) {
-				if ( !w.document ) {
-					throw new Error( "jQuery requires a window with a document" );
-				}
-				return factory( w );
-			};
-	} else {
-		factory( global );
-	}
-
-// Pass this if window is not defined yet
-}(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
-
-// Can't do this because several apps including ASP.NET trace
-// the stack via arguments.caller.callee and Firefox dies if
-// you try to trace through "use strict" call chains. (#13335)
-// Support: Firefox 18+
-//
-
-var arr = [];
-
-var slice = arr.slice;
-
-var concat = arr.concat;
-
-var push = arr.push;
-
-var indexOf = arr.indexOf;
-
-var class2type = {};
-
-var toString = class2type.toString;
-
-var hasOwn = class2type.hasOwnProperty;
-
-var support = {};
-
-
-
-var
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-	document = window.document,
-
-	version = "2.1.1 -deprecated,-css/hiddenVisibleSelectors,-effects/animatedSelector",
-
-	// Define a local copy of jQuery
-	jQuery = function( selector, context ) {
-		// The jQuery object is actually just the init constructor 'enhanced'
-		// Need init if jQuery is called (just allow error to be thrown if not included)
-		return new jQuery.fn.init( selector, context );
-	},
-
-	// Support: Android<4.1
-	// Make sure we trim BOM and NBSP
-	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,
-
-	// Matches dashed string for camelizing
-	rmsPrefix = /^-ms-/,
-	rdashAlpha = /-([\da-z])/gi,
-
-	// Used by jQuery.camelCase as callback to replace()
-	fcamelCase = function( all, letter ) {
-		return letter.toUpperCase();
-	};
-
-jQuery.fn = jQuery.prototype = {
-	// The current version of jQuery being used
-	jquery: version,
-
-	constructor: jQuery,
-
-	// Start with an empty selector
-	selector: "",
-
-	// The default length of a jQuery object is 0
-	length: 0,
-
-	toArray: function() {
-		return slice.call( this );
-	},
-
-	// Get the Nth element in the matched element set OR
-	// Get the whole matched element set as a clean array
-	get: function( num ) {
-		return num != null ?
-
-			// Return just the one element from the set
-			( num < 0 ? this[ num + this.length ] : this[ num ] ) :
-
-			// Return all the elements in a clean array
-			slice.call( this );
-	},
-
-	// Take an array of elements and push it onto the stack
-	// (returning the new matched element set)
-	pushStack: function( elems ) {
-
-		// Build a new jQuery matched element set
-		var ret = jQuery.merge( this.constructor(), elems );
-
-		// Add the old object onto the stack (as a reference)
-		ret.prevObject = this;
-		ret.context = this.context;
-
-		// Return the newly-formed element set
-		return ret;
-	},
-
-	// Execute a callback for every element in the matched set.
-	// (You can seed the arguments with an array of args, but this is
-	// only used internally.)
-	each: function( callback, args ) {
-		return jQuery.each( this, callback, args );
-	},
-
-	map: function( callback ) {
-		return this.pushStack( jQuery.map(this, function( elem, i ) {
-			return callback.call( elem, i, elem );
-		}));
-	},
-
-	slice: function() {
-		return this.pushStack( slice.apply( this, arguments ) );
-	},
-
-	first: function() {
-		return this.eq( 0 );
-	},
-
-	last: function() {
-		return this.eq( -1 );
-	},
-
-	eq: function( i ) {
-		var len = this.length,
-			j = +i + ( i < 0 ? len : 0 );
-		return this.pushStack( j >= 0 && j < len ? [ this[j] ] : [] );
-	},
-
-	end: function() {
-		return this.prevObject || this.constructor(null);
-	},
-
-	// For internal use only.
-	// Behaves like an Array's method, not like a jQuery method.
-	push: push,
-	sort: arr.sort,
-	splice: arr.splice
-};
-
-jQuery.extend = jQuery.fn.extend = function() {
-	var options, name, src, copy, copyIsArray, clone,
-		target = arguments[0] || {},
-		i = 1,
-		length = arguments.length,
-		deep = false;
-
-	// Handle a deep copy situation
-	if ( typeof target === "boolean" ) {
-		deep = target;
-
-		// skip the boolean and the target
-		target = arguments[ i ] || {};
-		i++;
-	}
-
-	// Handle case when target is a string or something (possible in deep copy)
-	if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
-		target = {};
-	}
-
-	// extend jQuery itself if only one argument is passed
-	if ( i === length ) {
-		target = this;
-		i--;
-	}
-
-	for ( ; i < length; i++ ) {
-		// Only deal with non-null/undefined values
-		if ( (options = arguments[ i ]) != null ) {
-			// Extend the base object
-			for ( name in options ) {
-				src = target[ name ];
-				copy = options[ name ];
-
-				// Prevent never-ending loop
-				if ( target === copy ) {
-					continue;
-				}
-
-				// Recurse if we're merging plain objects or arrays
-				if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
-					if ( copyIsArray ) {
-						copyIsArray = false;
-						clone = src && jQuery.isArray(src) ? src : [];
-
-					} else {
-						clone = src && jQuery.isPlainObject(src) ? src : {};
-					}
-
-					// Never move original objects, clone them
-					target[ name ] = jQuery.extend( deep, clone, copy );
-
-				// Don't bring in undefined values
-				} else if ( copy !== undefined ) {
-					target[ name ] = copy;
-				}
-			}
-		}
-	}
-
-	// Return the modified object
-	return target;
-};
-
-jQuery.extend({
-	// Unique for each copy of jQuery on the page
-	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
-
-	// Assume jQuery is ready without the ready module
-	isReady: true,
-
-	error: function( msg ) {
-		throw new Error( msg );
-	},
-
-	noop: function() {},
-
-	// See test/unit/core.js for details concerning isFunction.
-	// Since version 1.3, DOM methods and functions like alert
-	// aren't supported. They return false on IE (#2968).
-	isFunction: function( obj ) {
-		return jQuery.type(obj) === "function";
-	},
-
-	isArray: Array.isArray,
-
-	isWindow: function( obj ) {
-		return obj != null && obj === obj.window;
-	},
-
-	isNumeric: function( obj ) {
-		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
-		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
-		// subtraction forces infinities to NaN
-		return !jQuery.isArray( obj ) && obj - parseFloat( obj ) >= 0;
-	},
-
-	isPlainObject: function( obj ) {
-		// Not plain objects:
-		// - Any object or value whose internal [[Class]] property is not "[object Object]"
-		// - DOM nodes
-		// - window
-		if ( jQuery.type( obj ) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
-			return false;
-		}
-
-		if ( obj.constructor &&
-				!hasOwn.call( obj.constructor.prototype, "isPrototypeOf" ) ) {
-			return false;
-		}
-
-		// If the function hasn't returned already, we're confident that
-		// |obj| is a plain object, created by {} or constructed with new Object
-		return true;
-	},
-
-	isEmptyObject: function( obj ) {
-		var name;
-		for ( name in obj ) {
-			return false;
-		}
-		return true;
-	},
-
-	type: function( obj ) {
-		if ( obj == null ) {
-			return obj + "";
-		}
-		// Support: Android < 4.0, iOS < 6 (functionish RegExp)
-		return typeof obj === "object" || typeof obj === "function" ?
-			class2type[ toString.call(obj) ] || "object" :
-			typeof obj;
-	},
-
-	// Evaluates a script in a global context
-	globalEval: function( code ) {
-		var script,
-			indirect = eval;
-
-		code = jQuery.trim( code );
-
-		if ( code ) {
-			// If the code includes a valid, prologue position
-			// strict mode pragma, execute code by injecting a
-			// script tag into the document.
-			if ( code.indexOf("use strict") === 1 ) {
-				script = document.createElement("script");
-				script.text = code;
-				document.head.appendChild( script ).parentNode.removeChild( script );
-			} else {
-			// Otherwise, avoid the DOM node creation, insertion
-			// and removal by using an indirect global eval
-				indirect( code );
-			}
-		}
-	},
-
-	// Convert dashed to camelCase; used by the css and data modules
-	// Microsoft forgot to hump their vendor prefix (#9572)
-	camelCase: function( string ) {
-		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
-	},
-
-	nodeName: function( elem, name ) {
-		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
-	},
-
-	// args is for internal usage only
-	each: function( obj, callback, args ) {
-		var value,
-			i = 0,
-			length = obj.length,
-			isArray = isArraylike( obj );
-
-		if ( args ) {
-			if ( isArray ) {
-				for ( ; i < length; i++ ) {
-					value = callback.apply( obj[ i ], args );
-
-					if ( value === false ) {
-						break;
-					}
-				}
-			} else {
-				for ( i in obj ) {
-					value = callback.apply( obj[ i ], args );
-
-					if ( value === false ) {
-						break;
-					}
-				}
-			}
-
-		// A special, fast, case for the most common use of each
-		} else {
-			if ( isArray ) {
-				for ( ; i < length; i++ ) {
-					value = callback.call( obj[ i ], i, obj[ i ] );
-
-					if ( value === false ) {
-						break;
-					}
-				}
-			} else {
-				for ( i in obj ) {
-					value = callback.call( obj[ i ], i, obj[ i ] );
-
-					if ( value === false ) {
-						break;
-					}
-				}
-			}
-		}
-
-		return obj;
-	},
-
-	// Support: Android<4.1
-	trim: function( text ) {
-		return text == null ?
-			"" :
-			( text + "" ).replace( rtrim, "" );
-	},
-
-	// results is for internal usage only
-	makeArray: function( arr, results ) {
-		var ret = results || [];
-
-		if ( arr != null ) {
-			if ( isArraylike( Object(arr) ) ) {
-				jQuery.merge( ret,
-					typeof arr === "string" ?
-					[ arr ] : arr
-				);
-			} else {
-				push.call( ret, arr );
-			}
-		}
-
-		return ret;
-	},
-
-	inArray: function( elem, arr, i ) {
-		return arr == null ? -1 : indexOf.call( arr, elem, i );
-	},
-
-	merge: function( first, second ) {
-		var len = +second.length,
-			j = 0,
-			i = first.length;
-
-		for ( ; j < len; j++ ) {
-			first[ i++ ] = second[ j ];
-		}
-
-		first.length = i;
-
-		return first;
-	},
-
-	grep: function( elems, callback, invert ) {
-		var callbackInverse,
-			matches = [],
-			i = 0,
-			length = elems.length,
-			callbackExpect = !invert;
-
-		// Go through the array, only saving the items
-		// that pass the validator function
-		for ( ; i < length; i++ ) {
-			callbackInverse = !callback( elems[ i ], i );
-			if ( callbackInverse !== callbackExpect ) {
-				matches.push( elems[ i ] );
-			}
-		}
-
-		return matches;
-	},
-
-	// arg is for internal usage only
-	map: function( elems, callback, arg ) {
-		var value,
-			i = 0,
-			length = elems.length,
-			isArray = isArraylike( elems ),
-			ret = [];
-
-		// Go through the array, translating each of the items to their new values
-		if ( isArray ) {
-			for ( ; i < length; i++ ) {
-				value = callback( elems[ i ], i, arg );
-
-				if ( value != null ) {
-					ret.push( value );
-				}
-			}
-
-		// Go through every key on the object,
-		} else {
-			for ( i in elems ) {
-				value = callback( elems[ i ], i, arg );
-
-				if ( value != null ) {
-					ret.push( value );
-				}
-			}
-		}
-
-		// Flatten any nested arrays
-		return concat.apply( [], ret );
-	},
-
-	// A global GUID counter for objects
-	guid: 1,
-
-	// Bind a function to a context, optionally partially applying any
-	// arguments.
-	proxy: function( fn, context ) {
-		var tmp, args, proxy;
-
-		if ( typeof context === "string" ) {
-			tmp = fn[ context ];
-			context = fn;
-			fn = tmp;
-		}
-
-		// Quick check to determine if target is callable, in the spec
-		// this throws a TypeError, but we will just return undefined.
-		if ( !jQuery.isFunction( fn ) ) {
-			return undefined;
-		}
-
-		// Simulated bind
-		args = slice.call( arguments, 2 );
-		proxy = function() {
-			return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
-		};
-
-		// Set the guid of unique handler to the same of original handler, so it can be removed
-		proxy.guid = fn.guid = fn.guid || jQuery.guid++;
-
-		return proxy;
-	},
-
-	now: Date.now,
-
-	// jQuery.support is not used in Core but other projects attach their
-	// properties to it so it needs to exist.
-	support: support
-});
-
-// Populate the class2type map
-jQuery.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
-	class2type[ "[object " + name + "]" ] = name.toLowerCase();
-});
-
-function isArraylike( obj ) {
-	var length = obj.length,
-		type = jQuery.type( obj );
-
-	if ( type === "function" || jQuery.isWindow( obj ) ) {
-		return false;
-	}
-
-	if ( obj.nodeType === 1 && length ) {
-		return true;
-	}
-
-	return type === "array" || length === 0 ||
-		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
-}
-
-
-/*
- * Optional (non-Sizzle) selector module for custom builds.
- *
- * Note that this DOES NOT SUPPORT many documented jQuery
- * features in exchange for its smaller size:
- *
- * Attribute not equal selector
- * Positional selectors (:first; :eq(n); :odd; etc.)
- * Type selectors (:input; :checkbox; :button; etc.)
- * State-based selectors (:animated; :visible; :hidden; etc.)
- * :has(selector)
- * :not(complex selector)
- * custom selectors via Sizzle extensions
- * Leading combinators (e.g., $collection.find("> *"))
- * Reliable functionality on XML fragments
- * Requiring all parts of a selector to match elements under context
- *   (e.g., $div.find("div > *") now matches children of $div)
- * Matching against non-elements
- * Reliable sorting of disconnected nodes
- * querySelectorAll bug fixes (e.g., unreliable :focus on WebKit)
- *
- * If any of these are unacceptable tradeoffs, either use Sizzle or
- * customize this stub for the project's specific needs.
- */
-
-var docElem = window.document.documentElement,
-	selector_hasDuplicate,
-	matches = docElem.matches ||
-		docElem.webkitMatchesSelector ||
-		docElem.mozMatchesSelector ||
-		docElem.oMatchesSelector ||
-		docElem.msMatchesSelector,
-	selector_sortOrder = function( a, b ) {
-		// Flag for duplicate removal
-		if ( a === b ) {
-			selector_hasDuplicate = true;
-			return 0;
-		}
-
-		var compare = b.compareDocumentPosition && a.compareDocumentPosition && a.compareDocumentPosition( b );
-
-		if ( compare ) {
-			// Disconnected nodes
-			if ( compare & 1 ) {
-
-				// Choose the first element that is related to our document
-				if ( a === document || jQuery.contains(document, a) ) {
-					return -1;
-				}
-				if ( b === document || jQuery.contains(document, b) ) {
-					return 1;
-				}
-
-				// Maintain original order
-				return 0;
-			}
-
-			return compare & 4 ? -1 : 1;
-		}
-
-		// Not directly comparable, sort on existence of method
-		return a.compareDocumentPosition ? -1 : 1;
-	};
-
-jQuery.extend({
-	find: function( selector, context, results, seed ) {
-		var elem, nodeType,
-			i = 0;
-
-		results = results || [];
-		context = context || document;
-
-		// Same basic safeguard as Sizzle
-		if ( !selector || typeof selector !== "string" ) {
-			return results;
-		}
-
-		// Early return if context is not an element or document
-		if ( (nodeType = context.nodeType) !== 1 && nodeType !== 9 ) {
-			return [];
-		}
-
-		if ( seed ) {
-			while ( (elem = seed[i++]) ) {
-				if ( jQuery.find.matchesSelector(elem, selector) ) {
-					results.push( elem );
-				}
-			}
-		} else {
-			jQuery.merge( results, context.querySelectorAll(selector) );
-		}
-
-		return results;
-	},
-	unique: function( results ) {
-		var elem,
-			duplicates = [],
-			i = 0,
-			j = 0;
-
-		selector_hasDuplicate = false;
-		results.sort( selector_sortOrder );
-
-		if ( selector_hasDuplicate ) {
-			while ( (elem = results[i++]) ) {
-				if ( elem === results[ i ] ) {
-					j = duplicates.push( i );
-				}
-			}
-			while ( j-- ) {
-				results.splice( duplicates[ j ], 1 );
-			}
-		}
-
-		return results;
-	},
-	text: function( elem ) {
-		var node,
-			ret = "",
-			i = 0,
-			nodeType = elem.nodeType;
-
-		if ( !nodeType ) {
-			// If no nodeType, this is expected to be an array
-			while ( (node = elem[i++]) ) {
-				// Do not traverse comment nodes
-				ret += jQuery.text( node );
-			}
-		} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
-			// Use textContent for elements
-			return elem.textContent;
-		} else if ( nodeType === 3 || nodeType === 4 ) {
-			return elem.nodeValue;
-		}
-		// Do not include comment or processing instruction nodes
-
-		return ret;
-	},
-	contains: function( a, b ) {
-		var adown = a.nodeType === 9 ? a.documentElement : a,
-			bup = b && b.parentNode;
-		return a === bup || !!( bup && bup.nodeType === 1 && adown.contains(bup) );
-	},
-	isXMLDoc: function( elem ) {
-		return (elem.ownerDocument || elem).documentElement.nodeName !== "HTML";
-	},
-	expr: {
-		attrHandle: {},
-		match: {
-			bool: /^(?:checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped)$/i,
-			needsContext: /^[\x20\t\r\n\f]*[>+~]/
-		}
-	}
-});
-
-jQuery.extend( jQuery.find, {
-	matches: function( expr, elements ) {
-		return jQuery.find( expr, null, null, elements );
-	},
-	matchesSelector: function( elem, expr ) {
-		return matches.call( elem, expr );
-	},
-	attr: function( elem, name ) {
-		return elem.getAttribute( name );
-	}
-});
-
-
-
-var rneedsContext = jQuery.expr.match.needsContext;
-
-var rsingleTag = (/^<(\w+)\s*\/?>(?:<\/\1>|)$/);
-
-
-
-var risSimple = /^.[^:#\[\.,]*$/;
-
-// Implement the identical functionality for filter and not
-function winnow( elements, qualifier, not ) {
-	if ( jQuery.isFunction( qualifier ) ) {
-		return jQuery.grep( elements, function( elem, i ) {
-			/* jshint -W018 */
-			return !!qualifier.call( elem, i, elem ) !== not;
-		});
-
-	}
-
-	if ( qualifier.nodeType ) {
-		return jQuery.grep( elements, function( elem ) {
-			return ( elem === qualifier ) !== not;
-		});
-
-	}
-
-	if ( typeof qualifier === "string" ) {
-		if ( risSimple.test( qualifier ) ) {
-			return jQuery.filter( qualifier, elements, not );
-		}
-
-		qualifier = jQuery.filter( qualifier, elements );
-	}
-
-	return jQuery.grep( elements, function( elem ) {
-		return ( indexOf.call( qualifier, elem ) >= 0 ) !== not;
-	});
-}
-
-jQuery.filter = function( expr, elems, not ) {
-	var elem = elems[ 0 ];
-
-	if ( not ) {
-		expr = ":not(" + expr + ")";
-	}
-
-	return elems.length === 1 && elem.nodeType === 1 ?
-		jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
-		jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
-			return elem.nodeType === 1;
-		}));
-};
-
-jQuery.fn.extend({
-	find: function( selector ) {
-		var i,
-			len = this.length,
-			ret = [],
-			self = this;
-
-		if ( typeof selector !== "string" ) {
-			return this.pushStack( jQuery( selector ).filter(function() {
-				for ( i = 0; i < len; i++ ) {
-					if ( jQuery.contains( self[ i ], this ) ) {
-						return true;
-					}
-				}
-			}) );
-		}
-
-		for ( i = 0; i < len; i++ ) {
-			jQuery.find( selector, self[ i ], ret );
-		}
-
-		// Needed because $( selector, context ) becomes $( context ).find( selector )
-		ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
-		ret.selector = this.selector ? this.selector + " " + selector : selector;
-		return ret;
-	},
-	filter: function( selector ) {
-		return this.pushStack( winnow(this, selector || [], false) );
-	},
-	not: function( selector ) {
-		return this.pushStack( winnow(this, selector || [], true) );
-	},
-	is: function( selector ) {
-		return !!winnow(
-			this,
-
-			// If this is a positional/relative selector, check membership in the returned set
-			// so $("p:first").is("p:last") won't return true for a doc with two "p".
-			typeof selector === "string" && rneedsContext.test( selector ) ?
-				jQuery( selector ) :
-				selector || [],
-			false
-		).length;
-	}
-});
-
-
-// Initialize a jQuery object
-
-
-// A central reference to the root jQuery(document)
-var rootjQuery,
-
-	// A simple way to check for HTML strings
-	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
-	// Strict HTML recognition (#11290: must start with <)
-	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,
-
-	init = jQuery.fn.init = function( selector, context ) {
-		var match, elem;
-
-		// HANDLE: $(""), $(null), $(undefined), $(false)
-		if ( !selector ) {
-			return this;
-		}
-
-		// Handle HTML strings
-		if ( typeof selector === "string" ) {
-			if ( selector[0] === "<" && selector[ selector.length - 1 ] === ">" && selector.length >= 3 ) {
-				// Assume that strings that start and end with <> are HTML and skip the regex check
-				match = [ null, selector, null ];
-
-			} else {
-				match = rquickExpr.exec( selector );
-			}
-
-			// Match html or make sure no context is specified for #id
-			if ( match && (match[1] || !context) ) {
-
-				// HANDLE: $(html) -> $(array)
-				if ( match[1] ) {
-					context = context instanceof jQuery ? context[0] : context;
-
-					// scripts is true for back-compat
-					// Intentionally let the error be thrown if parseHTML is not present
-					jQuery.merge( this, jQuery.parseHTML(
-						match[1],
-						context && context.nodeType ? context.ownerDocument || context : document,
-						true
-					) );
-
-					// HANDLE: $(html, props)
-					if ( rsingleTag.test( match[1] ) && jQuery.isPlainObject( context ) ) {
-						for ( match in context ) {
-							// Properties of context are called as methods if possible
-							if ( jQuery.isFunction( this[ match ] ) ) {
-								this[ match ]( context[ match ] );
-
-							// ...and otherwise set as attributes
-							} else {
-								this.attr( match, context[ match ] );
-							}
-						}
-					}
-
-					return this;
-
-				// HANDLE: $(#id)
-				} else {
-					elem = document.getElementById( match[2] );
-
-					// Check parentNode to catch when Blackberry 4.6 returns
-					// nodes that are no longer in the document #6963
-					if ( elem && elem.parentNode ) {
-						// Inject the element directly into the jQuery object
-						this.length = 1;
-						this[0] = elem;
-					}
-
-					this.context = document;
-					this.selector = selector;
-					return this;
-				}
-
-			// HANDLE: $(expr, $(...))
-			} else if ( !context || context.jquery ) {
-				return ( context || rootjQuery ).find( selector );
-
-			// HANDLE: $(expr, context)
-			// (which is just equivalent to: $(context).find(expr)
-			} else {
-				return this.constructor( context ).find( selector );
-			}
-
-		// HANDLE: $(DOMElement)
-		} else if ( selector.nodeType ) {
-			this.context = this[0] = selector;
-			this.length = 1;
-			return this;
-
-		// HANDLE: $(function)
-		// Shortcut for document ready
-		} else if ( jQuery.isFunction( selector ) ) {
-			return typeof rootjQuery.ready !== "undefined" ?
-				rootjQuery.ready( selector ) :
-				// Execute immediately if ready is not present
-				selector( jQuery );
-		}
-
-		if ( selector.selector !== undefined ) {
-			this.selector = selector.selector;
-			this.context = selector.context;
-		}
-
-		return jQuery.makeArray( selector, this );
-	};
-
-// Give the init function the jQuery prototype for later instantiation
-init.prototype = jQuery.fn;
-
-// Initialize central reference
-rootjQuery = jQuery( document );
-
-
-var rparentsprev = /^(?:parents|prev(?:Until|All))/,
-	// methods guaranteed to produce a unique set when starting from a unique set
-	guaranteedUnique = {
-		children: true,
-		contents: true,
-		next: true,
-		prev: true
-	};
-
-jQuery.extend({
-	dir: function( elem, dir, until ) {
-		var matched = [],
-			truncate = until !== undefined;
-
-		while ( (elem = elem[ dir ]) && elem.nodeType !== 9 ) {
-			if ( elem.nodeType === 1 ) {
-				if ( truncate && jQuery( elem ).is( until ) ) {
-					break;
-				}
-				matched.push( elem );
-			}
-		}
-		return matched;
-	},
-
-	sibling: function( n, elem ) {
-		var matched = [];
-
-		for ( ; n; n = n.nextSibling ) {
-			if ( n.nodeType === 1 && n !== elem ) {
-				matched.push( n );
-			}
-		}
-
-		return matched;
-	}
-});
-
-jQuery.fn.extend({
-	has: function( target ) {
-		var targets = jQuery( target, this ),
-			l = targets.length;
-
-		return this.filter(function() {
-			var i = 0;
-			for ( ; i < l; i++ ) {
-				if ( jQuery.contains( this, targets[i] ) ) {
-					return true;
-				}
-			}
-		});
-	},
-
-	closest: function( selectors, context ) {
-		var cur,
-			i = 0,
-			l = this.length,
-			matched = [],
-			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
-				jQuery( selectors, context || this.context ) :
-				0;
-
-		for ( ; i < l; i++ ) {
-			for ( cur = this[i]; cur && cur !== context; cur = cur.parentNode ) {
-				// Always skip document fragments
-				if ( cur.nodeType < 11 && (pos ?
-					pos.index(cur) > -1 :
-
-					// Don't pass non-elements to Sizzle
-					cur.nodeType === 1 &&
-						jQuery.find.matchesSelector(cur, selectors)) ) {
-
-					matched.push( cur );
-					break;
-				}
-			}
-		}
-
-		return this.pushStack( matched.length > 1 ? jQuery.unique( matched ) : matched );
-	},
-
-	// Determine the position of an element within
-	// the matched set of elements
-	index: function( elem ) {
-
-		// No argument, return index in parent
-		if ( !elem ) {
-			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
-		}
-
-		// index in selector
-		if ( typeof elem === "string" ) {
-			return indexOf.call( jQuery( elem ), this[ 0 ] );
-		}
-
-		// Locate the position of the desired element
-		return indexOf.call( this,
-
-			// If it receives a jQuery object, the first element is used
-			elem.jquery ? elem[ 0 ] : elem
-		);
-	},
-
-	add: function( selector, context ) {
-		return this.pushStack(
-			jQuery.unique(
-				jQuery.merge( this.get(), jQuery( selector, context ) )
-			)
-		);
-	},
-
-	addBack: function( selector ) {
-		return this.add( selector == null ?
-			this.prevObject : this.prevObject.filter(selector)
-		);
-	}
-});
-
-function sibling( cur, dir ) {
-	while ( (cur = cur[dir]) && cur.nodeType !== 1 ) {}
-	return cur;
-}
-
-jQuery.each({
-	parent: function( elem ) {
-		var parent = elem.parentNode;
-		return parent && parent.nodeType !== 11 ? parent : null;
-	},
-	parents: function( elem ) {
-		return jQuery.dir( elem, "parentNode" );
-	},
-	parentsUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "parentNode", until );
-	},
-	next: function( elem ) {
-		return sibling( elem, "nextSibling" );
-	},
-	prev: function( elem ) {
-		return sibling( elem, "previousSibling" );
-	},
-	nextAll: function( elem ) {
-		return jQuery.dir( elem, "nextSibling" );
-	},
-	prevAll: function( elem ) {
-		return jQuery.dir( elem, "previousSibling" );
-	},
-	nextUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "nextSibling", until );
-	},
-	prevUntil: function( elem, i, until ) {
-		return jQuery.dir( elem, "previousSibling", until );
-	},
-	siblings: function( elem ) {
-		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
-	},
-	children: function( elem ) {
-		return jQuery.sibling( elem.firstChild );
-	},
-	contents: function( elem ) {
-		return elem.contentDocument || jQuery.merge( [], elem.childNodes );
-	}
-}, function( name, fn ) {
-	jQuery.fn[ name ] = function( until, selector ) {
-		var matched = jQuery.map( this, fn, until );
-
-		if ( name.slice( -5 ) !== "Until" ) {
-			selector = until;
-		}
-
-		if ( selector && typeof selector === "string" ) {
-			matched = jQuery.filter( selector, matched );
-		}
-
-		if ( this.length > 1 ) {
-			// Remove duplicates
-			if ( !guaranteedUnique[ name ] ) {
-				jQuery.unique( matched );
-			}
-
-			// Reverse order for parents* and prev-derivatives
-			if ( rparentsprev.test( name ) ) {
-				matched.reverse();
-			}
-		}
-
-		return this.pushStack( matched );
-	};
-});
-var rnotwhite = (/\S+/g);
-
-
-
-// String to Object options format cache
-var optionsCache = {};
-
-// Convert String-formatted options into Object-formatted ones and store in cache
-function createOptions( options ) {
-	var object = optionsCache[ options ] = {};
-	jQuery.each( options.match( rnotwhite ) || [], function( _, flag ) {
-		object[ flag ] = true;
-	});
-	return object;
-}
-
-/*
- * Create a callback list using the following parameters:
- *
- *	options: an optional list of space-separated options that will change how
- *			the callback list behaves or a more traditional option object
- *
- * By default a callback list will act like an event callback list and can be
- * "fired" multiple times.
- *
- * Possible options:
- *
- *	once:			will ensure the callback list can only be fired once (like a Deferred)
- *
- *	memory:			will keep track of previous values and will call any callback added
- *					after the list has been fired right away with the latest "memorized"
- *					values (like a Deferred)
- *
- *	unique:			will ensure a callback can only be added once (no duplicate in the list)
- *
- *	stopOnFalse:	interrupt callings when a callback returns false
- *
- */
-jQuery.Callbacks = function( options ) {
-
-	// Convert options from String-formatted to Object-formatted if needed
-	// (we check in cache first)
-	options = typeof options === "string" ?
-		( optionsCache[ options ] || createOptions( options ) ) :
-		jQuery.extend( {}, options );
-
-	var // Last fire value (for non-forgettable lists)
-		memory,
-		// Flag to know if list was already fired
-		fired,
-		// Flag to know if list is currently firing
-		firing,
-		// First callback to fire (used internally by add and fireWith)
-		firingStart,
-		// End of the loop when firing
-		firingLength,
-		// Index of currently firing callback (modified by remove if needed)
-		firingIndex,
-		// Actual callback list
-		list = [],
-		// Stack of fire calls for repeatable lists
-		stack = !options.once && [],
-		// Fire callbacks
-		fire = function( data ) {
-			memory = options.memory && data;
-			fired = true;
-			firingIndex = firingStart || 0;
-			firingStart = 0;
-			firingLength = list.length;
-			firing = true;
-			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
-				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
-					memory = false; // To prevent further calls using add
-					break;
-				}
-			}
-			firing = false;
-			if ( list ) {
-				if ( stack ) {
-					if ( stack.length ) {
-						fire( stack.shift() );
-					}
-				} else if ( memory ) {
-					list = [];
-				} else {
-					self.disable();
-				}
-			}
-		},
-		// Actual Callbacks object
-		self = {
-			// Add a callback or a collection of callbacks to the list
-			add: function() {
-				if ( list ) {
-					// First, we save the current length
-					var start = list.length;
-					(function add( args ) {
-						jQuery.each( args, function( _, arg ) {
-							var type = jQuery.type( arg );
-							if ( type === "function" ) {
-								if ( !options.unique || !self.has( arg ) ) {
-									list.push( arg );
-								}
-							} else if ( arg && arg.length && type !== "string" ) {
-								// Inspect recursively
-								add( arg );
-							}
-						});
-					})( arguments );
-					// Do we need to add the callbacks to the
-					// current firing batch?
-					if ( firing ) {
-						firingLength = list.length;
-					// With memory, if we're not firing then
-					// we should call right away
-					} else if ( memory ) {
-						firingStart = start;
-						fire( memory );
-					}
-				}
-				return this;
-			},
-			// Remove a callback from the list
-			remove: function() {
-				if ( list ) {
-					jQuery.each( arguments, function( _, arg ) {
-						var index;
-						while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
-							list.splice( index, 1 );
-							// Handle firing indexes
-							if ( firing ) {
-								if ( index <= firingLength ) {
-									firingLength--;
-								}
-								if ( index <= firingIndex ) {
-									firingIndex--;
-								}
-							}
-						}
-					});
-				}
-				return this;
-			},
-			// Check if a given callback is in the list.
-			// If no argument is given, return whether or not list has callbacks attached.
-			has: function( fn ) {
-				return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
-			},
-			// Remove all callbacks from the list
-			empty: function() {
-				list = [];
-				firingLength = 0;
-				return this;
-			},
-			// Have the list do nothing anymore
-			disable: function() {
-				list = stack = memory = undefined;
-				return this;
-			},
-			// Is it disabled?
-			disabled: function() {
-				return !list;
-			},
-			// Lock the list in its current state
-			lock: function() {
-				stack = undefined;
-				if ( !memory ) {
-					self.disable();
-				}
-				return this;
-			},
-			// Is it locked?
-			locked: function() {
-				return !stack;
-			},
-			// Call all callbacks with the given context and arguments
-			fireWith: function( context, args ) {
-				if ( list && ( !fired || stack ) ) {
-					args = args || [];
-					args = [ context, args.slice ? args.slice() : args ];
-					if ( firing ) {
-						stack.push( args );
-					} else {
-						fire( args );
-					}
-				}
-				return this;
-			},
-			// Call all the callbacks with the given arguments
-			fire: function() {
-				self.fireWith( this, arguments );
-				return this;
-			},
-			// To know if the callbacks have already been called at least once
-			fired: function() {
-				return !!fired;
-			}
-		};
-
-	return self;
-};
-
-
-jQuery.extend({
-
-	Deferred: function( func ) {
-		var tuples = [
-				// action, add listener, listener list, final state
-				[ "resolve", "done", jQuery.Callbacks("once memory"), "resolved" ],
-				[ "reject", "fail", jQuery.Callbacks("once memory"), "rejected" ],
-				[ "notify", "progress", jQuery.Callbacks("memory") ]
-			],
-			state = "pending",
-			promise = {
-				state: function() {
-					return state;
-				},
-				always: function() {
-					deferred.done( arguments ).fail( arguments );
-					return this;
-				},
-				then: function( /* fnDone, fnFail, fnProgress */ ) {
-					var fns = arguments;
-					return jQuery.Deferred(function( newDefer ) {
-						jQuery.each( tuples, function( i, tuple ) {
-							var fn = jQuery.isFunction( fns[ i ] ) && fns[ i ];
-							// deferred[ done | fail | progress ] for forwarding actions to newDefer
-							deferred[ tuple[1] ](function() {
-								var returned = fn && fn.apply( this, arguments );
-								if ( returned && jQuery.isFunction( returned.promise ) ) {
-									returned.promise()
-										.done( newDefer.resolve )
-										.fail( newDefer.reject )
-										.progress( newDefer.notify );
-								} else {
-									newDefer[ tuple[ 0 ] + "With" ]( this === promise ? newDefer.promise() : this, fn ? [ returned ] : arguments );
-								}
-							});
-						});
-						fns = null;
-					}).promise();
-				},
-				// Get a promise for this deferred
-				// If obj is provided, the promise aspect is added to the object
-				promise: function( obj ) {
-					return obj != null ? jQuery.extend( obj, promise ) : promise;
-				}
-			},
-			deferred = {};
-
-		// Keep pipe for back-compat
-		promise.pipe = promise.then;
-
-		// Add list-specific methods
-		jQuery.each( tuples, function( i, tuple ) {
-			var list = tuple[ 2 ],
-				stateString = tuple[ 3 ];
-
-			// promise[ done | fail | progress ] = list.add
-			promise[ tuple[1] ] = list.add;
-
-			// Handle state
-			if ( stateString ) {
-				list.add(function() {
-					// state = [ resolved | rejected ]
-					state = stateString;
-
-				// [ reject_list | resolve_list ].disable; progress_list.lock
-				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
-			}
-
-			// deferred[ resolve | reject | notify ]
-			deferred[ tuple[0] ] = function() {
-				deferred[ tuple[0] + "With" ]( this === deferred ? promise : this, arguments );
-				return this;
-			};
-			deferred[ tuple[0] + "With" ] = list.fireWith;
-		});
-
-		// Make the deferred a promise
-		promise.promise( deferred );
-
-		// Call given func if any
-		if ( func ) {
-			func.call( deferred, deferred );
-		}
-
-		// All done!
-		return deferred;
-	},
-
-	// Deferred helper
-	when: function( subordinate /* , ..., subordinateN */ ) {
-		var i = 0,
-			resolveValues = slice.call( arguments ),
-			length = resolveValues.length,
-
-			// the count of uncompleted subordinates
-			remaining = length !== 1 || ( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,
-
-			// the master Deferred. If resolveValues consist of only a single Deferred, just use that.
-			deferred = remaining === 1 ? subordinate : jQuery.Deferred(),
-
-			// Update function for both resolve and progress values
-			updateFunc = function( i, contexts, values ) {
-				return function( value ) {
-					contexts[ i ] = this;
-					values[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
-					if ( values === progressValues ) {
-						deferred.notifyWith( contexts, values );
-					} else if ( !( --remaining ) ) {
-						deferred.resolveWith( contexts, values );
-					}
-				};
-			},
-
-			progressValues, progressContexts, resolveContexts;
-
-		// add listeners to Deferred subordinates; treat others as resolved
-		if ( length > 1 ) {
-			progressValues = new Array( length );
-			progressContexts = new Array( length );
-			resolveContexts = new Array( length );
-			for ( ; i < length; i++ ) {
-				if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
-					resolveValues[ i ].promise()
-						.done( updateFunc( i, resolveContexts, resolveValues ) )
-						.fail( deferred.reject )
-						.progress( updateFunc( i, progressContexts, progressValues ) );
-				} else {
-					--remaining;
-				}
-			}
-		}
-
-		// if we're not waiting on anything, resolve the master
-		if ( !remaining ) {
-			deferred.resolveWith( resolveContexts, resolveValues );
-		}
-
-		return deferred.promise();
-	}
-});
-
-
-// The deferred used on DOM ready
-var readyList;
-
-jQuery.fn.ready = function( fn ) {
-	// Add the callback
-	jQuery.ready.promise().done( fn );
-
-	return this;
-};
-
-jQuery.extend({
-	// Is the DOM ready to be used? Set to true once it occurs.
-	isReady: false,
-
-	// A counter to track how many items to wait for before
-	// the ready event fires. See #6781
-	readyWait: 1,
-
-	// Hold (or release) the ready event
-	holdReady: function( hold ) {
-		if ( hold ) {
-			jQuery.readyWait++;
-		} else {
-			jQuery.ready( true );
-		}
-	},
-
-	// Handle when the DOM is ready
-	ready: function( wait ) {
-
-		// Abort if there are pending holds or we're already ready
-		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
-			return;
-		}
-
-		// Remember that the DOM is ready
-		jQuery.isReady = true;
-
-		// If a normal DOM Ready event fired, decrement, and wait if need be
-		if ( wait !== true && --jQuery.readyWait > 0 ) {
-			return;
-		}
-
-		// If there are functions bound, to execute
-		readyList.resolveWith( document, [ jQuery ] );
-
-		// Trigger any bound ready events
-		if ( jQuery.fn.triggerHandler ) {
-			jQuery( document ).triggerHandler( "ready" );
-			jQuery( document ).off( "ready" );
-		}
-	}
-});
-
-/**
- * The ready event handler and self cleanup method
- */
-function completed() {
-	document.removeEventListener( "DOMContentLoaded", completed, false );
-	window.removeEventListener( "load", completed, false );
-	jQuery.ready();
-}
-
-jQuery.ready.promise = function( obj ) {
-	if ( !readyList ) {
-
-		readyList = jQuery.Deferred();
-
-		// Catch cases where $(document).ready() is called after the browser event has already occurred.
-		// we once tried to use readyState "interactive" here, but it caused issues like the one
-		// discovered by ChrisS here: http://bugs.jquery.com/ticket/12282#comment:15
-		if ( document.readyState === "complete" ) {
-			// Handle it asynchronously to allow scripts the opportunity to delay ready
-			setTimeout( jQuery.ready );
-
-		} else {
-
-			// Use the handy event callback
-			document.addEventListener( "DOMContentLoaded", completed, false );
-
-			// A fallback to window.onload, that will always work
-			window.addEventListener( "load", completed, false );
-		}
-	}
-	return readyList.promise( obj );
-};
-
-// Kick off the DOM ready check even if the user does not
-jQuery.ready.promise();
-
-
-
-
-// Multifunctional method to get and set values of a collection
-// The value/s can optionally be executed if it's a function
-var access = jQuery.access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
-	var i = 0,
-		len = elems.length,
-		bulk = key == null;
-
-	// Sets many values
-	if ( jQuery.type( key ) === "object" ) {
-		chainable = true;
-		for ( i in key ) {
-			jQuery.access( elems, fn, i, key[i], true, emptyGet, raw );
-		}
-
-	// Sets one value
-	} else if ( value !== undefined ) {
-		chainable = true;
-
-		if ( !jQuery.isFunction( value ) ) {
-			raw = true;
-		}
-
-		if ( bulk ) {
-			// Bulk operations run against the entire set
-			if ( raw ) {
-				fn.call( elems, value );
-				fn = null;
-
-			// ...except when executing function values
-			} else {
-				bulk = fn;
-				fn = function( elem, key, value ) {
-					return bulk.call( jQuery( elem ), value );
-				};
-			}
-		}
-
-		if ( fn ) {
-			for ( ; i < len; i++ ) {
-				fn( elems[i], key, raw ? value : value.call( elems[i], i, fn( elems[i], key ) ) );
-			}
-		}
-	}
-
-	return chainable ?
-		elems :
-
-		// Gets
-		bulk ?
-			fn.call( elems ) :
-			len ? fn( elems[0], key ) : emptyGet;
-};
-
-
-/**
- * Determines whether an object can have data
- */
-jQuery.acceptData = function( owner ) {
-	// Accepts only:
-	//  - Node
-	//    - Node.ELEMENT_NODE
-	//    - Node.DOCUMENT_NODE
-	//  - Object
-	//    - Any
-	/* jshint -W018 */
-	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
-};
-
-
-function Data() {
-	// Support: Android < 4,
-	// Old WebKit does not have Object.preventExtensions/freeze method,
-	// return new empty object instead with no [[set]] accessor
-	Object.defineProperty( this.cache = {}, 0, {
-		get: function() {
-			return {};
-		}
-	});
-
-	this.expando = jQuery.expando + Math.random();
-}
-
-Data.uid = 1;
-Data.accepts = jQuery.acceptData;
-
-Data.prototype = {
-	key: function( owner ) {
-		// We can accept data for non-element nodes in modern browsers,
-		// but we should not, see #8335.
-		// Always return the key for a frozen object.
-		if ( !Data.accepts( owner ) ) {
-			return 0;
-		}
-
-		var descriptor = {},
-			// Check if the owner object already has a cache key
-			unlock = owner[ this.expando ];
-
-		// If not, create one
-		if ( !unlock ) {
-			unlock = Data.uid++;
-
-			// Secure it in a non-enumerable, non-writable property
-			try {
-				descriptor[ this.expando ] = { value: unlock };
-				Object.defineProperties( owner, descriptor );
-
-			// Support: Android < 4
-			// Fallback to a less secure definition
-			} catch ( e ) {
-				descriptor[ this.expando ] = unlock;
-				jQuery.extend( owner, descriptor );
-			}
-		}
-
-		// Ensure the cache object
-		if ( !this.cache[ unlock ] ) {
-			this.cache[ unlock ] = {};
-		}
-
-		return unlock;
-	},
-	set: function( owner, data, value ) {
-		var prop,
-			// There may be an unlock assigned to this node,
-			// if there is no entry for this "owner", create one inline
-			// and set the unlock as though an owner entry had always existed
-			unlock = this.key( owner ),
-			cache = this.cache[ unlock ];
-
-		// Handle: [ owner, key, value ] args
-		if ( typeof data === "string" ) {
-			cache[ data ] = value;
-
-		// Handle: [ owner, { properties } ] args
-		} else {
-			// Fresh assignments by object are shallow copied
-			if ( jQuery.isEmptyObject( cache ) ) {
-				jQuery.extend( this.cache[ unlock ], data );
-			// Otherwise, copy the properties one-by-one to the cache object
-			} else {
-				for ( prop in data ) {
-					cache[ prop ] = data[ prop ];
-				}
-			}
-		}
-		return cache;
-	},
-	get: function( owner, key ) {
-		// Either a valid cache is found, or will be created.
-		// New caches will be created and the unlock returned,
-		// allowing direct access to the newly created
-		// empty data object. A valid owner object must be provided.
-		var cache = this.cache[ this.key( owner ) ];
-
-		return key === undefined ?
-			cache : cache[ key ];
-	},
-	access: function( owner, key, value ) {
-		var stored;
-		// In cases where either:
-		//
-		//   1. No key was specified
-		//   2. A string key was specified, but no value provided
-		//
-		// Take the "read" path and allow the get method to determine
-		// which value to return, respectively either:
-		//
-		//   1. The entire cache object
-		//   2. The data stored at the key
-		//
-		if ( key === undefined ||
-				((key && typeof key === "string") && value === undefined) ) {
-
-			stored = this.get( owner, key );
-
-			return stored !== undefined ?
-				stored : this.get( owner, jQuery.camelCase(key) );
-		}
-
-		// [*]When the key is not a string, or both a key and value
-		// are specified, set or extend (existing objects) with either:
-		//
-		//   1. An object of properties
-		//   2. A key and value
-		//
-		this.set( owner, key, value );
-
-		// Since the "set" path can have two possible entry points
-		// return the expected data based on which path was taken[*]
-		return value !== undefined ? value : key;
-	},
-	remove: function( owner, key ) {
-		var i, name, camel,
-			unlock = this.key( owner ),
-			cache = this.cache[ unlock ];
-
-		if ( key === undefined ) {
-			this.cache[ unlock ] = {};
-
-		} else {
-			// Support array or space separated string of keys
-			if ( jQuery.isArray( key ) ) {
-				// If "name" is an array of keys...
-				// When data is initially created, via ("key", "val") signature,
-				// keys will be converted to camelCase.
-				// Since there is no way to tell _how_ a key was added, remove
-				// both plain key and camelCase key. #12786
-				// This will only penalize the array argument path.
-				name = key.concat( key.map( jQuery.camelCase ) );
-			} else {
-				camel = jQuery.camelCase( key );
-				// Try the string as a key before any manipulation
-				if ( key in cache ) {
-					name = [ key, camel ];
-				} else {
-					// If a key with the spaces exists, use it.
-					// Otherwise, create an array by matching non-whitespace
-					name = camel;
-					name = name in cache ?
-						[ name ] : ( name.match( rnotwhite ) || [] );
-				}
-			}
-
-			i = name.length;
-			while ( i-- ) {
-				delete cache[ name[ i ] ];
-			}
-		}
-	},
-	hasData: function( owner ) {
-		return !jQuery.isEmptyObject(
-			this.cache[ owner[ this.expando ] ] || {}
-		);
-	},
-	discard: function( owner ) {
-		if ( owner[ this.expando ] ) {
-			delete this.cache[ owner[ this.expando ] ];
-		}
-	}
-};
-var data_priv = new Data();
-
-var data_user = new Data();
-
-
-
-/*
-	Implementation Summary
-
-	1. Enforce API surface and semantic compatibility with 1.9.x branch
-	2. Improve the module's maintainability by reducing the storage
-		paths to a single mechanism.
-	3. Use the same single mechanism to support "private" and "user" data.
-	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
-	5. Avoid exposing implementation details on user objects (eg. expando properties)
-	6. Provide a clear path for implementation upgrade to WeakMap in 2014
-*/
-var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
-	rmultiDash = /([A-Z])/g;
-
-function dataAttr( elem, key, data ) {
-	var name;
-
-	// If nothing was found internally, try to fetch any
-	// data from the HTML5 data-* attribute
-	if ( data === undefined && elem.nodeType === 1 ) {
-		name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
-		data = elem.getAttribute( name );
-
-		if ( typeof data === "string" ) {
-			try {
-				data = data === "true" ? true :
-					data === "false" ? false :
-					data === "null" ? null :
-					// Only convert to a number if it doesn't change the string
-					+data + "" === data ? +data :
-					rbrace.test( data ) ? jQuery.parseJSON( data ) :
-					data;
-			} catch( e ) {}
-
-			// Make sure we set the data so it isn't changed later
-			data_user.set( elem, key, data );
-		} else {
-			data = undefined;
-		}
-	}
-	return data;
-}
-
-jQuery.extend({
-	hasData: function( elem ) {
-		return data_user.hasData( elem ) || data_priv.hasData( elem );
-	},
-
-	data: function( elem, name, data ) {
-		return data_user.access( elem, name, data );
-	},
-
-	removeData: function( elem, name ) {
-		data_user.remove( elem, name );
-	},
-
-	// TODO: Now that all calls to _data and _removeData have been replaced
-	// with direct calls to data_priv methods, these can be deprecated.
-	_data: function( elem, name, data ) {
-		return data_priv.access( elem, name, data );
-	},
-
-	_removeData: function( elem, name ) {
-		data_priv.remove( elem, name );
-	}
-});
-
-jQuery.fn.extend({
-	data: function( key, value ) {
-		var i, name, data,
-			elem = this[ 0 ],
-			attrs = elem && elem.attributes;
-
-		// Gets all values
-		if ( key === undefined ) {
-			if ( this.length ) {
-				data = data_user.get( elem );
-
-				if ( elem.nodeType === 1 && !data_priv.get( elem, "hasDataAttrs" ) ) {
-					i = attrs.length;
-					while ( i-- ) {
-
-						// Support: IE11+
-						// The attrs elements can be null (#14894)
-						if ( attrs[ i ] ) {
-							name = attrs[ i ].name;
-							if ( name.indexOf( "data-" ) === 0 ) {
-								name = jQuery.camelCase( name.slice(5) );
-								dataAttr( elem, name, data[ name ] );
-							}
-						}
-					}
-					data_priv.set( elem, "hasDataAttrs", true );
-				}
-			}
-
-			return data;
-		}
-
-		// Sets multiple values
-		if ( typeof key === "object" ) {
-			return this.each(function() {
-				data_user.set( this, key );
-			});
-		}
-
-		return access( this, function( value ) {
-			var data,
-				camelKey = jQuery.camelCase( key );
-
-			// The calling jQuery object (element matches) is not empty
-			// (and therefore has an element appears at this[ 0 ]) and the
-			// `value` parameter was not undefined. An empty jQuery object
-			// will result in `undefined` for elem = this[ 0 ] which will
-			// throw an exception if an attempt to read a data cache is made.
-			if ( elem && value === undefined ) {
-				// Attempt to get data from the cache
-				// with the key as-is
-				data = data_user.get( elem, key );
-				if ( data !== undefined ) {
-					return data;
-				}
-
-				// Attempt to get data from the cache
-				// with the key camelized
-				data = data_user.get( elem, camelKey );
-				if ( data !== undefined ) {
-					return data;
-				}
-
-				// Attempt to "discover" the data in
-				// HTML5 custom data-* attrs
-				data = dataAttr( elem, camelKey, undefined );
-				if ( data !== undefined ) {
-					return data;
-				}
-
-				// We tried really hard, but the data doesn't exist.
-				return;
-			}
-
-			// Set the data...
-			this.each(function() {
-				// First, attempt to store a copy or reference of any
-				// data that might've been store with a camelCased key.
-				var data = data_user.get( this, camelKey );
-
-				// For HTML5 data-* attribute interop, we have to
-				// store property names with dashes in a camelCase form.
-				// This might not apply to all properties...*
-				data_user.set( this, camelKey, value );
-
-				// *... In the case of properties that might _actually_
-				// have dashes, we need to also store a copy of that
-				// unchanged property.
-				if ( key.indexOf("-") !== -1 && data !== undefined ) {
-					data_user.set( this, key, value );
-				}
-			});
-		}, null, value, arguments.length > 1, null, true );
-	},
-
-	removeData: function( key ) {
-		return this.each(function() {
-			data_user.remove( this, key );
-		});
-	}
-});
-
-
-jQuery.extend({
-	queue: function( elem, type, data ) {
-		var queue;
-
-		if ( elem ) {
-			type = ( type || "fx" ) + "queue";
-			queue = data_priv.get( elem, type );
-
-			// Speed up dequeue by getting out quickly if this is just a lookup
-			if ( data ) {
-				if ( !queue || jQuery.isArray( data ) ) {
-					queue = data_priv.access( elem, type, jQuery.makeArray(data) );
-				} else {
-					queue.push( data );
-				}
-			}
-			return queue || [];
-		}
-	},
-
-	dequeue: function( elem, type ) {
-		type = type || "fx";
-
-		var queue = jQuery.queue( elem, type ),
-			startLength = queue.length,
-			fn = queue.shift(),
-			hooks = jQuery._queueHooks( elem, type ),
-			next = function() {
-				jQuery.dequeue( elem, type );
-			};
-
-		// If the fx queue is dequeued, always remove the progress sentinel
-		if ( fn === "inprogress" ) {
-			fn = queue.shift();
-			startLength--;
-		}
-
-		if ( fn ) {
-
-			// Add a progress sentinel to prevent the fx queue from being
-			// automatically dequeued
-			if ( type === "fx" ) {
-				queue.unshift( "inprogress" );
-			}
-
-			// clear up the last queue stop function
-			delete hooks.stop;
-			fn.call( elem, next, hooks );
-		}
-
-		if ( !startLength && hooks ) {
-			hooks.empty.fire();
-		}
-	},
-
-	// not intended for public consumption - generates a queueHooks object, or returns the current one
-	_queueHooks: function( elem, type ) {
-		var key = type + "queueHooks";
-		return data_priv.get( elem, key ) || data_priv.access( elem, key, {
-			empty: jQuery.Callbacks("once memory").add(function() {
-				data_priv.remove( elem, [ type + "queue", key ] );
-			})
-		});
-	}
-});
-
-jQuery.fn.extend({
-	queue: function( type, data ) {
-		var setter = 2;
-
-		if ( typeof type !== "string" ) {
-			data = type;
-			type = "fx";
-			setter--;
-		}
-
-		if ( arguments.length < setter ) {
-			return jQuery.queue( this[0], type );
-		}
-
-		return data === undefined ?
-			this :
-			this.each(function() {
-				var queue = jQuery.queue( this, type, data );
-
-				// ensure a hooks for this queue
-				jQuery._queueHooks( this, type );
-
-				if ( type === "fx" && queue[0] !== "inprogress" ) {
-					jQuery.dequeue( this, type );
-				}
-			});
-	},
-	dequeue: function( type ) {
-		return this.each(function() {
-			jQuery.dequeue( this, type );
-		});
-	},
-	clearQueue: function( type ) {
-		return this.queue( type || "fx", [] );
-	},
-	// Get a promise resolved when queues of a certain type
-	// are emptied (fx is the type by default)
-	promise: function( type, obj ) {
-		var tmp,
-			count = 1,
-			defer = jQuery.Deferred(),
-			elements = this,
-			i = this.length,
-			resolve = function() {
-				if ( !( --count ) ) {
-					defer.resolveWith( elements, [ elements ] );
-				}
-			};
-
-		if ( typeof type !== "string" ) {
-			obj = type;
-			type = undefined;
-		}
-		type = type || "fx";
-
-		while ( i-- ) {
-			tmp = data_priv.get( elements[ i ], type + "queueHooks" );
-			if ( tmp && tmp.empty ) {
-				count++;
-				tmp.empty.add( resolve );
-			}
-		}
-		resolve();
-		return defer.promise( obj );
-	}
-});
-var pnum = (/[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/).source;
-
-var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
-
-var isHidden = function( elem, el ) {
-		// isHidden might be called from jQuery#filter function;
-		// in that case, element will be second argument
-		elem = el || elem;
-		return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
-	};
-
-var rcheckableType = (/^(?:checkbox|radio)$/i);
-
-
-
-(function() {
-	var fragment = document.createDocumentFragment(),
-		div = fragment.appendChild( document.createElement( "div" ) ),
-		input = document.createElement( "input" );
-
-	// #11217 - WebKit loses check when the name is after the checked attribute
-	// Support: Windows Web Apps (WWA)
-	// `name` and `type` need .setAttribute for WWA
-	input.setAttribute( "type", "radio" );
-	input.setAttribute( "checked", "checked" );
-	input.setAttribute( "name", "t" );
-
-	div.appendChild( input );
-
-	// Support: Safari 5.1, iOS 5.1, Android 4.x, Android 2.3
-	// old WebKit doesn't clone checked state correctly in fragments
-	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
-
-	// Make sure textarea (and checkbox) defaultValue is properly cloned
-	// Support: IE9-IE11+
-	div.innerHTML = "<textarea>x</textarea>";
-	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
-})();
-var strundefined = typeof undefined;
-
-
-
-support.focusinBubbles = "onfocusin" in window;
-
-
-var
-	rkeyEvent = /^key/,
-	rmouseEvent = /^(?:mouse|pointer|contextmenu)|click/,
-	rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
-	rtypenamespace = /^([^.]*)(?:\.(.+)|)$/;
-
-function returnTrue() {
-	return true;
-}
-
-function returnFalse() {
-	return false;
-}
-
-function safeActiveElement() {
-	try {
-		return document.activeElement;
-	} catch ( err ) { }
-}
-
-/*
- * Helper functions for managing events -- not part of the public interface.
- * Props to Dean Edwards' addEvent library for many of the ideas.
- */
-jQuery.event = {
-
-	global: {},
-
-	add: function( elem, types, handler, data, selector ) {
-
-		var handleObjIn, eventHandle, tmp,
-			events, t, handleObj,
-			special, handlers, type, namespaces, origType,
-			elemData = data_priv.get( elem );
-
-		// Don't attach events to noData or text/comment nodes (but allow plain objects)
-		if ( !elemData ) {
-			return;
-		}
-
-		// Caller can pass in an object of custom data in lieu of the handler
-		if ( handler.handler ) {
-			handleObjIn = handler;
-			handler = handleObjIn.handler;
-			selector = handleObjIn.selector;
-		}
-
-		// Make sure that the handler has a unique ID, used to find/remove it later
-		if ( !handler.guid ) {
-			handler.guid = jQuery.guid++;
-		}
-
-		// Init the element's event structure and main handler, if this is the first
-		if ( !(events = elemData.events) ) {
-			events = elemData.events = {};
-		}
-		if ( !(eventHandle = elemData.handle) ) {
-			eventHandle = elemData.handle = function( e ) {
-				// Discard the second event of a jQuery.event.trigger() and
-				// when an event is called after a page has unloaded
-				return typeof jQuery !== strundefined && jQuery.event.triggered !== e.type ?
-					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
-			};
-		}
-
-		// Handle multiple events separated by a space
-		types = ( types || "" ).match( rnotwhite ) || [ "" ];
-		t = types.length;
-		while ( t-- ) {
-			tmp = rtypenamespace.exec( types[t] ) || [];
-			type = origType = tmp[1];
-			namespaces = ( tmp[2] || "" ).split( "." ).sort();
-
-			// There *must* be a type, no attaching namespace-only handlers
-			if ( !type ) {
-				continue;
-			}
-
-			// If event changes its type, use the special event handlers for the changed type
-			special = jQuery.event.special[ type ] || {};
-
-			// If selector defined, determine special event api type, otherwise given type
-			type = ( selector ? special.delegateType : special.bindType ) || type;
-
-			// Update special based on newly reset type
-			special = jQuery.event.special[ type ] || {};
-
-			// handleObj is passed to all event handlers
-			handleObj = jQuery.extend({
-				type: type,
-				origType: origType,
-				data: data,
-				handler: handler,
-				guid: handler.guid,
-				selector: selector,
-				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
-				namespace: namespaces.join(".")
-			}, handleObjIn );
-
-			// Init the event handler queue if we're the first
-			if ( !(handlers = events[ type ]) ) {
-				handlers = events[ type ] = [];
-				handlers.delegateCount = 0;
-
-				// Only use addEventListener if the special events handler returns false
-				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
-					if ( elem.addEventListener ) {
-						elem.addEventListener( type, eventHandle, false );
-					}
-				}
-			}
-
-			if ( special.add ) {
-				special.add.call( elem, handleObj );
-
-				if ( !handleObj.handler.guid ) {
-					handleObj.handler.guid = handler.guid;
-				}
-			}
-
-			// Add to the element's handler list, delegates in front
-			if ( selector ) {
-				handlers.splice( handlers.delegateCount++, 0, handleObj );
-			} else {
-				handlers.push( handleObj );
-			}
-
-			// Keep track of which events have ever been used, for event optimization
-			jQuery.event.global[ type ] = true;
-		}
-
-	},
-
-	// Detach an event or set of events from an element
-	remove: function( elem, types, handler, selector, mappedTypes ) {
-
-		var j, origCount, tmp,
-			events, t, handleObj,
-			special, handlers, type, namespaces, origType,
-			elemData = data_priv.hasData( elem ) && data_priv.get( elem );
-
-		if ( !elemData || !(events = elemData.events) ) {
-			return;
-		}
-
-		// Once for each type.namespace in types; type may be omitted
-		types = ( types || "" ).match( rnotwhite ) || [ "" ];
-		t = types.length;
-		while ( t-- ) {
-			tmp = rtypenamespace.exec( types[t] ) || [];
-			type = origType = tmp[1];
-			namespaces = ( tmp[2] || "" ).split( "." ).sort();
-
-			// Unbind all events (on this namespace, if provided) for the element
-			if ( !type ) {
-				for ( type in events ) {
-					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
-				}
-				continue;
-			}
-
-			special = jQuery.event.special[ type ] || {};
-			type = ( selector ? special.delegateType : special.bindType ) || type;
-			handlers = events[ type ] || [];
-			tmp = tmp[2] && new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" );
-
-			// Remove matching events
-			origCount = j = handlers.length;
-			while ( j-- ) {
-				handleObj = handlers[ j ];
-
-				if ( ( mappedTypes || origType === handleObj.origType ) &&
-					( !handler || handler.guid === handleObj.guid ) &&
-					( !tmp || tmp.test( handleObj.namespace ) ) &&
-					( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
-					handlers.splice( j, 1 );
-
-					if ( handleObj.selector ) {
-						handlers.delegateCount--;
-					}
-					if ( special.remove ) {
-						special.remove.call( elem, handleObj );
-					}
-				}
-			}
-
-			// Remove generic event handler if we removed something and no more handlers exist
-			// (avoids potential for endless recursion during removal of special event handlers)
-			if ( origCount && !handlers.length ) {
-				if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
-					jQuery.removeEvent( elem, type, elemData.handle );
-				}
-
-				delete events[ type ];
-			}
-		}
-
-		// Remove the expando if it's no longer used
-		if ( jQuery.isEmptyObject( events ) ) {
-			delete elemData.handle;
-			data_priv.remove( elem, "events" );
-		}
-	},
-
-	trigger: function( event, data, elem, onlyHandlers ) {
-
-		var i, cur, tmp, bubbleType, ontype, handle, special,
-			eventPath = [ elem || document ],
-			type = hasOwn.call( event, "type" ) ? event.type : event,
-			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split(".") : [];
-
-		cur = tmp = elem = elem || document;
-
-		// Don't do events on text and comment nodes
-		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
-			return;
-		}
-
-		// focus/blur morphs to focusin/out; ensure we're not firing them right now
-		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
-			return;
-		}
-
-		if ( type.indexOf(".") >= 0 ) {
-			// Namespaced trigger; create a regexp to match event type in handle()
-			namespaces = type.split(".");
-			type = namespaces.shift();
-			namespaces.sort();
-		}
-		ontype = type.indexOf(":") < 0 && "on" + type;
-
-		// Caller can pass in a jQuery.Event object, Object, or just an event type string
-		event = event[ jQuery.expando ] ?
-			event :
-			new jQuery.Event( type, typeof event === "object" && event );
-
-		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
-		event.isTrigger = onlyHandlers ? 2 : 3;
-		event.namespace = namespaces.join(".");
-		event.namespace_re = event.namespace ?
-			new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" ) :
-			null;
-
-		// Clean up the event in case it is being reused
-		event.result = undefined;
-		if ( !event.target ) {
-			event.target = elem;
-		}
-
-		// Clone any incoming data and prepend the event, creating the handler arg list
-		data = data == null ?
-			[ event ] :
-			jQuery.makeArray( data, [ event ] );
-
-		// Allow special events to draw outside the lines
-		special = jQuery.event.special[ type ] || {};
-		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
-			return;
-		}
-
-		// Determine event propagation path in advance, per W3C events spec (#9951)
-		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
-		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {
-
-			bubbleType = special.delegateType || type;
-			if ( !rfocusMorph.test( bubbleType + type ) ) {
-				cur = cur.parentNode;
-			}
-			for ( ; cur; cur = cur.parentNode ) {
-				eventPath.push( cur );
-				tmp = cur;
-			}
-
-			// Only add window if we got to document (e.g., not plain obj or detached DOM)
-			if ( tmp === (elem.ownerDocument || document) ) {
-				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
-			}
-		}
-
-		// Fire handlers on the event path
-		i = 0;
-		while ( (cur = eventPath[i++]) && !event.isPropagationStopped() ) {
-
-			event.type = i > 1 ?
-				bubbleType :
-				special.bindType || type;
-
-			// jQuery handler
-			handle = ( data_priv.get( cur, "events" ) || {} )[ event.type ] && data_priv.get( cur, "handle" );
-			if ( handle ) {
-				handle.apply( cur, data );
-			}
-
-			// Native handler
-			handle = ontype && cur[ ontype ];
-			if ( handle && handle.apply && jQuery.acceptData( cur ) ) {
-				event.result = handle.apply( cur, data );
-				if ( event.result === false ) {
-					event.preventDefault();
-				}
-			}
-		}
-		event.type = type;
-
-		// If nobody prevented the default action, do it now
-		if ( !onlyHandlers && !event.isDefaultPrevented() ) {
-
-			if ( (!special._default || special._default.apply( eventPath.pop(), data ) === false) &&
-				jQuery.acceptData( elem ) ) {
-
-				// Call a native DOM method on the target with the same name name as the event.
-				// Don't do default actions on window, that's where global variables be (#6170)
-				if ( ontype && jQuery.isFunction( elem[ type ] ) && !jQuery.isWindow( elem ) ) {
-
-					// Don't re-trigger an onFOO event when we call its FOO() method
-					tmp = elem[ ontype ];
-
-					if ( tmp ) {
-						elem[ ontype ] = null;
-					}
-
-					// Prevent re-triggering of the same event, since we already bubbled it above
-					jQuery.event.triggered = type;
-					elem[ type ]();
-					jQuery.event.triggered = undefined;
-
-					if ( tmp ) {
-						elem[ ontype ] = tmp;
-					}
-				}
-			}
-		}
-
-		return event.result;
-	},
-
-	dispatch: function( event ) {
-
-		// Make a writable jQuery.Event from the native event object
-		event = jQuery.event.fix( event );
-
-		var i, j, ret, matched, handleObj,
-			handlerQueue = [],
-			args = slice.call( arguments ),
-			handlers = ( data_priv.get( this, "events" ) || {} )[ event.type ] || [],
-			special = jQuery.event.special[ event.type ] || {};
-
-		// Use the fix-ed jQuery.Event rather than the (read-only) native event
-		args[0] = event;
-		event.delegateTarget = this;
-
-		// Call the preDispatch hook for the mapped type, and let it bail if desired
-		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
-			return;
-		}
-
-		// Determine handlers
-		handlerQueue = jQuery.event.handlers.call( this, event, handlers );
-
-		// Run delegates first; they may want to stop propagation beneath us
-		i = 0;
-		while ( (matched = handlerQueue[ i++ ]) && !event.isPropagationStopped() ) {
-			event.currentTarget = matched.elem;
-
-			j = 0;
-			while ( (handleObj = matched.handlers[ j++ ]) && !event.isImmediatePropagationStopped() ) {
-
-				// Triggered event must either 1) have no namespace, or
-				// 2) have namespace(s) a subset or equal to those in the bound event (both can have no namespace).
-				if ( !event.namespace_re || event.namespace_re.test( handleObj.namespace ) ) {
-
-					event.handleObj = handleObj;
-					event.data = handleObj.data;
-
-					ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
-							.apply( matched.elem, args );
-
-					if ( ret !== undefined ) {
-						if ( (event.result = ret) === false ) {
-							event.preventDefault();
-							event.stopPropagation();
-						}
-					}
-				}
-			}
-		}
-
-		// Call the postDispatch hook for the mapped type
-		if ( special.postDispatch ) {
-			special.postDispatch.call( this, event );
-		}
-
-		return event.result;
-	},
-
-	handlers: function( event, handlers ) {
-		var i, matches, sel, handleObj,
-			handlerQueue = [],
-			delegateCount = handlers.delegateCount,
-			cur = event.target;
-
-		// Find delegate handlers
-		// Black-hole SVG <use> instance trees (#13180)
-		// Avoid non-left-click bubbling in Firefox (#3861)
-		if ( delegateCount && cur.nodeType && (!event.button || event.type !== "click") ) {
-
-			for ( ; cur !== this; cur = cur.parentNode || this ) {
-
-				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
-				if ( cur.disabled !== true || event.type !== "click" ) {
-					matches = [];
-					for ( i = 0; i < delegateCount; i++ ) {
-						handleObj = handlers[ i ];
-
-						// Don't conflict with Object.prototype properties (#13203)
-						sel = handleObj.selector + " ";
-
-						if ( matches[ sel ] === undefined ) {
-							matches[ sel ] = handleObj.needsContext ?
-								jQuery( sel, this ).index( cur ) >= 0 :
-								jQuery.find( sel, this, null, [ cur ] ).length;
-						}
-						if ( matches[ sel ] ) {
-							matches.push( handleObj );
-						}
-					}
-					if ( matches.length ) {
-						handlerQueue.push({ elem: cur, handlers: matches });
-					}
-				}
-			}
-		}
-
-		// Add the remaining (directly-bound) handlers
-		if ( delegateCount < handlers.length ) {
-			handlerQueue.push({ elem: this, handlers: handlers.slice( delegateCount ) });
-		}
-
-		return handlerQueue;
-	},
-
-	// Includes some event props shared by KeyEvent and MouseEvent
-	props: "altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),
-
-	fixHooks: {},
-
-	keyHooks: {
-		props: "char charCode key keyCode".split(" "),
-		filter: function( event, original ) {
-
-			// Add which for key events
-			if ( event.which == null ) {
-				event.which = original.charCode != null ? original.charCode : original.keyCode;
-			}
-
-			return event;
-		}
-	},
-
-	mouseHooks: {
-		props: "button buttons clientX clientY offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
-		filter: function( event, original ) {
-			var eventDoc, doc, body,
-				button = original.button;
-
-			// Calculate pageX/Y if missing and clientX/Y available
-			if ( event.pageX == null && original.clientX != null ) {
-				eventDoc = event.target.ownerDocument || document;
-				doc = eventDoc.documentElement;
-				body = eventDoc.body;
-
-				event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
-				event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
-			}
-
-			// Add which for click: 1 === left; 2 === middle; 3 === right
-			// Note: button is not normalized, so don't use it
-			if ( !event.which && button !== undefined ) {
-				event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
-			}
-
-			return event;
-		}
-	},
-
-	fix: function( event ) {
-		if ( event[ jQuery.expando ] ) {
-			return event;
-		}
-
-		// Create a writable copy of the event object and normalize some properties
-		var i, prop, copy,
-			type = event.type,
-			originalEvent = event,
-			fixHook = this.fixHooks[ type ];
-
-		if ( !fixHook ) {
-			this.fixHooks[ type ] = fixHook =
-				rmouseEvent.test( type ) ? this.mouseHooks :
-				rkeyEvent.test( type ) ? this.keyHooks :
-				{};
-		}
-		copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;
-
-		event = new jQuery.Event( originalEvent );
-
-		i = copy.length;
-		while ( i-- ) {
-			prop = copy[ i ];
-			event[ prop ] = originalEvent[ prop ];
-		}
-
-		// Support: Cordova 2.5 (WebKit) (#13255)
-		// All events should have a target; Cordova deviceready doesn't
-		if ( !event.target ) {
-			event.target = document;
-		}
-
-		// Support: Safari 6.0+, Chrome < 28
-		// Target should not be a text node (#504, #13143)
-		if ( event.target.nodeType === 3 ) {
-			event.target = event.target.parentNode;
-		}
-
-		return fixHook.filter ? fixHook.filter( event, originalEvent ) : event;
-	},
-
-	special: {
-		load: {
-			// Prevent triggered image.load events from bubbling to window.load
-			noBubble: true
-		},
-		focus: {
-			// Fire native event if possible so blur/focus sequence is correct
-			trigger: function() {
-				if ( this !== safeActiveElement() && this.focus ) {
-					this.focus();
-					return false;
-				}
-			},
-			delegateType: "focusin"
-		},
-		blur: {
-			trigger: function() {
-				if ( this === safeActiveElement() && this.blur ) {
-					this.blur();
-					return false;
-				}
-			},
-			delegateType: "focusout"
-		},
-		click: {
-			// For checkbox, fire native event so checked state will be right
-			trigger: function() {
-				if ( this.type === "checkbox" && this.click && jQuery.nodeName( this, "input" ) ) {
-					this.click();
-					return false;
-				}
-			},
-
-			// For cross-browser consistency, don't fire native .click() on links
-			_default: function( event ) {
-				return jQuery.nodeName( event.target, "a" );
-			}
-		},
-
-		beforeunload: {
-			postDispatch: function( event ) {
-
-				// Support: Firefox 20+
-				// Firefox doesn't alert if the returnValue field is not set.
-				if ( event.result !== undefined && event.originalEvent ) {
-					event.originalEvent.returnValue = event.result;
-				}
-			}
-		}
-	},
-
-	simulate: function( type, elem, event, bubble ) {
-		// Piggyback on a donor event to simulate a different one.
-		// Fake originalEvent to avoid donor's stopPropagation, but if the
-		// simulated event prevents default then we do the same on the donor.
-		var e = jQuery.extend(
-			new jQuery.Event(),
-			event,
-			{
-				type: type,
-				isSimulated: true,
-				originalEvent: {}
-			}
-		);
-		if ( bubble ) {
-			jQuery.event.trigger( e, null, elem );
-		} else {
-			jQuery.event.dispatch.call( elem, e );
-		}
-		if ( e.isDefaultPrevented() ) {
-			event.preventDefault();
-		}
-	}
-};
-
-jQuery.removeEvent = function( elem, type, handle ) {
-	if ( elem.removeEventListener ) {
-		elem.removeEventListener( type, handle, false );
-	}
-};
-
-jQuery.Event = function( src, props ) {
-	// Allow instantiation without the 'new' keyword
-	if ( !(this instanceof jQuery.Event) ) {
-		return new jQuery.Event( src, props );
-	}
-
-	// Event object
-	if ( src && src.type ) {
-		this.originalEvent = src;
-		this.type = src.type;
-
-		// Events bubbling up the document may have been marked as prevented
-		// by a handler lower down the tree; reflect the correct value.
-		this.isDefaultPrevented = src.defaultPrevented ||
-				src.defaultPrevented === undefined &&
-				// Support: Android < 4.0
-				src.returnValue === false ?
-			returnTrue :
-			returnFalse;
-
-	// Event type
-	} else {
-		this.type = src;
-	}
-
-	// Put explicitly provided properties onto the event object
-	if ( props ) {
-		jQuery.extend( this, props );
-	}
-
-	// Create a timestamp if incoming event doesn't have one
-	this.timeStamp = src && src.timeStamp || jQuery.now();
-
-	// Mark it as fixed
-	this[ jQuery.expando ] = true;
-};
-
-// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
-// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
-jQuery.Event.prototype = {
-	isDefaultPrevented: returnFalse,
-	isPropagationStopped: returnFalse,
-	isImmediatePropagationStopped: returnFalse,
-
-	preventDefault: function() {
-		var e = this.originalEvent;
-
-		this.isDefaultPrevented = returnTrue;
-
-		if ( e && e.preventDefault ) {
-			e.preventDefault();
-		}
-	},
-	stopPropagation: function() {
-		var e = this.originalEvent;
-
-		this.isPropagationStopped = returnTrue;
-
-		if ( e && e.stopPropagation ) {
-			e.stopPropagation();
-		}
-	},
-	stopImmediatePropagation: function() {
-		var e = this.originalEvent;
-
-		this.isImmediatePropagationStopped = returnTrue;
-
-		if ( e && e.stopImmediatePropagation ) {
-			e.stopImmediatePropagation();
-		}
-
-		this.stopPropagation();
-	}
-};
-
-// Create mouseenter/leave events using mouseover/out and event-time checks
-// Support: Chrome 15+
-jQuery.each({
-	mouseenter: "mouseover",
-	mouseleave: "mouseout",
-	pointerenter: "pointerover",
-	pointerleave: "pointerout"
-}, function( orig, fix ) {
-	jQuery.event.special[ orig ] = {
-		delegateType: fix,
-		bindType: fix,
-
-		handle: function( event ) {
-			var ret,
-				target = this,
-				related = event.relatedTarget,
-				handleObj = event.handleObj;
-
-			// For mousenter/leave call the handler if related is outside the target.
-			// NB: No relatedTarget if the mouse left/entered the browser window
-			if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
-				event.type = handleObj.origType;
-				ret = handleObj.handler.apply( this, arguments );
-				event.type = fix;
-			}
-			return ret;
-		}
-	};
-});
-
-// Create "bubbling" focus and blur events
-// Support: Firefox, Chrome, Safari
-if ( !support.focusinBubbles ) {
-	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {
-
-		// Attach a single capturing handler on the document while someone wants focusin/focusout
-		var handler = function( event ) {
-				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
-			};
-
-		jQuery.event.special[ fix ] = {
-			setup: function() {
-				var doc = this.ownerDocument || this,
-					attaches = data_priv.access( doc, fix );
-
-				if ( !attaches ) {
-					doc.addEventListener( orig, handler, true );
-				}
-				data_priv.access( doc, fix, ( attaches || 0 ) + 1 );
-			},
-			teardown: function() {
-				var doc = this.ownerDocument || this,
-					attaches = data_priv.access( doc, fix ) - 1;
-
-				if ( !attaches ) {
-					doc.removeEventListener( orig, handler, true );
-					data_priv.remove( doc, fix );
-
-				} else {
-					data_priv.access( doc, fix, attaches );
-				}
-			}
-		};
-	});
-}
-
-jQuery.fn.extend({
-
-	on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
-		var origFn, type;
-
-		// Types can be a map of types/handlers
-		if ( typeof types === "object" ) {
-			// ( types-Object, selector, data )
-			if ( typeof selector !== "string" ) {
-				// ( types-Object, data )
-				data = data || selector;
-				selector = undefined;
-			}
-			for ( type in types ) {
-				this.on( type, selector, data, types[ type ], one );
-			}
-			return this;
-		}
-
-		if ( data == null && fn == null ) {
-			// ( types, fn )
-			fn = selector;
-			data = selector = undefined;
-		} else if ( fn == null ) {
-			if ( typeof selector === "string" ) {
-				// ( types, selector, fn )
-				fn = data;
-				data = undefined;
-			} else {
-				// ( types, data, fn )
-				fn = data;
-				data = selector;
-				selector = undefined;
-			}
-		}
-		if ( fn === false ) {
-			fn = returnFalse;
-		} else if ( !fn ) {
-			return this;
-		}
-
-		if ( one === 1 ) {
-			origFn = fn;
-			fn = function( event ) {
-				// Can use an empty set, since event contains the info
-				jQuery().off( event );
-				return origFn.apply( this, arguments );
-			};
-			// Use same guid so caller can remove using origFn
-			fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
-		}
-		return this.each( function() {
-			jQuery.event.add( this, types, fn, data, selector );
-		});
-	},
-	one: function( types, selector, data, fn ) {
-		return this.on( types, selector, data, fn, 1 );
-	},
-	off: function( types, selector, fn ) {
-		var handleObj, type;
-		if ( types && types.preventDefault && types.handleObj ) {
-			// ( event )  dispatched jQuery.Event
-			handleObj = types.handleObj;
-			jQuery( types.delegateTarget ).off(
-				handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
-				handleObj.selector,
-				handleObj.handler
-			);
-			return this;
-		}
-		if ( typeof types === "object" ) {
-			// ( types-object [, selector] )
-			for ( type in types ) {
-				this.off( type, selector, types[ type ] );
-			}
-			return this;
-		}
-		if ( selector === false || typeof selector === "function" ) {
-			// ( types [, fn] )
-			fn = selector;
-			selector = undefined;
-		}
-		if ( fn === false ) {
-			fn = returnFalse;
-		}
-		return this.each(function() {
-			jQuery.event.remove( this, types, fn, selector );
-		});
-	},
-
-	trigger: function( type, data ) {
-		return this.each(function() {
-			jQuery.event.trigger( type, data, this );
-		});
-	},
-	triggerHandler: function( type, data ) {
-		var elem = this[0];
-		if ( elem ) {
-			return jQuery.event.trigger( type, data, elem, true );
-		}
-	}
-});
-
-
-var
-	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,
-	rtagName = /<([\w:]+)/,
-	rhtml = /<|&#?\w+;/,
-	rnoInnerhtml = /<(?:script|style|link)/i,
-	// checked="checked" or checked
-	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
-	rscriptType = /^$|\/(?:java|ecma)script/i,
-	rscriptTypeMasked = /^true\/(.*)/,
-	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,
-
-	// We have to close these tags to support XHTML (#13200)
-	wrapMap = {
-
-		// Support: IE 9
-		option: [ 1, "<select multiple='multiple'>", "</select>" ],
-
-		thead: [ 1, "<table>", "</table>" ],
-		col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
-		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
-		td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
-
-		_default: [ 0, "", "" ]
-	};
-
-// Support: IE 9
-wrapMap.optgroup = wrapMap.option;
-
-wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
-wrapMap.th = wrapMap.td;
-
-// Support: 1.x compatibility
-// Manipulating tables requires a tbody
-function manipulationTarget( elem, content ) {
-	return jQuery.nodeName( elem, "table" ) &&
-		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ?
-
-		elem.getElementsByTagName("tbody")[0] ||
-			elem.appendChild( elem.ownerDocument.createElement("tbody") ) :
-		elem;
-}
-
-// Replace/restore the type attribute of script elements for safe DOM manipulation
-function disableScript( elem ) {
-	elem.type = (elem.getAttribute("type") !== null) + "/" + elem.type;
-	return elem;
-}
-function restoreScript( elem ) {
-	var match = rscriptTypeMasked.exec( elem.type );
-
-	if ( match ) {
-		elem.type = match[ 1 ];
-	} else {
-		elem.removeAttribute("type");
-	}
-
-	return elem;
-}
-
-// Mark scripts as having already been evaluated
-function setGlobalEval( elems, refElements ) {
-	var i = 0,
-		l = elems.length;
-
-	for ( ; i < l; i++ ) {
-		data_priv.set(
-			elems[ i ], "globalEval", !refElements || data_priv.get( refElements[ i ], "globalEval" )
-		);
-	}
-}
-
-function cloneCopyEvent( src, dest ) {
-	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
-
-	if ( dest.nodeType !== 1 ) {
-		return;
-	}
-
-	// 1. Copy private data: events, handlers, etc.
-	if ( data_priv.hasData( src ) ) {
-		pdataOld = data_priv.access( src );
-		pdataCur = data_priv.set( dest, pdataOld );
-		events = pdataOld.events;
-
-		if ( events ) {
-			delete pdataCur.handle;
-			pdataCur.events = {};
-
-			for ( type in events ) {
-				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
-					jQuery.event.add( dest, type, events[ type ][ i ] );
-				}
-			}
-		}
-	}
-
-	// 2. Copy user data
-	if ( data_user.hasData( src ) ) {
-		udataOld = data_user.access( src );
-		udataCur = jQuery.extend( {}, udataOld );
-
-		data_user.set( dest, udataCur );
-	}
-}
-
-function getAll( context, tag ) {
-	var ret = context.getElementsByTagName ? context.getElementsByTagName( tag || "*" ) :
-			context.querySelectorAll ? context.querySelectorAll( tag || "*" ) :
-			[];
-
-	return tag === undefined || tag && jQuery.nodeName( context, tag ) ?
-		jQuery.merge( [ context ], ret ) :
-		ret;
-}
-
-// Support: IE >= 9
-function fixInput( src, dest ) {
-	var nodeName = dest.nodeName.toLowerCase();
-
-	// Fails to persist the checked state of a cloned checkbox or radio button.
-	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
-		dest.checked = src.checked;
-
-	// Fails to return the selected option to the default selected state when cloning options
-	} else if ( nodeName === "input" || nodeName === "textarea" ) {
-		dest.defaultValue = src.defaultValue;
-	}
-}
-
-jQuery.extend({
-	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
-		var i, l, srcElements, destElements,
-			clone = elem.cloneNode( true ),
-			inPage = jQuery.contains( elem.ownerDocument, elem );
-
-		// Support: IE >= 9
-		// Fix Cloning issues
-		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
-				!jQuery.isXMLDoc( elem ) ) {
-
-			// We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
-			destElements = getAll( clone );
-			srcElements = getAll( elem );
-
-			for ( i = 0, l = srcElements.length; i < l; i++ ) {
-				fixInput( srcElements[ i ], destElements[ i ] );
-			}
-		}
-
-		// Copy the events from the original to the clone
-		if ( dataAndEvents ) {
-			if ( deepDataAndEvents ) {
-				srcElements = srcElements || getAll( elem );
-				destElements = destElements || getAll( clone );
-
-				for ( i = 0, l = srcElements.length; i < l; i++ ) {
-					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
-				}
-			} else {
-				cloneCopyEvent( elem, clone );
-			}
-		}
-
-		// Preserve script evaluation history
-		destElements = getAll( clone, "script" );
-		if ( destElements.length > 0 ) {
-			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
-		}
-
-		// Return the cloned set
-		return clone;
-	},
-
-	buildFragment: function( elems, context, scripts, selection ) {
-		var elem, tmp, tag, wrap, contains, j,
-			fragment = context.createDocumentFragment(),
-			nodes = [],
-			i = 0,
-			l = elems.length;
-
-		for ( ; i < l; i++ ) {
-			elem = elems[ i ];
-
-			if ( elem || elem === 0 ) {
-
-				// Add nodes directly
-				if ( jQuery.type( elem ) === "object" ) {
-					// Support: QtWebKit
-					// jQuery.merge because push.apply(_, arraylike) throws
-					jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
-
-				// Convert non-html into a text node
-				} else if ( !rhtml.test( elem ) ) {
-					nodes.push( context.createTextNode( elem ) );
-
-				// Convert html into DOM nodes
-				} else {
-					tmp = tmp || fragment.appendChild( context.createElement("div") );
-
-					// Deserialize a standard representation
-					tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
-					wrap = wrapMap[ tag ] || wrapMap._default;
-					tmp.innerHTML = wrap[ 1 ] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[ 2 ];
-
-					// Descend through wrappers to the right content
-					j = wrap[ 0 ];
-					while ( j-- ) {
-						tmp = tmp.lastChild;
-					}
-
-					// Support: QtWebKit
-					// jQuery.merge because push.apply(_, arraylike) throws
-					jQuery.merge( nodes, tmp.childNodes );
-
-					// Remember the top-level container
-					tmp = fragment.firstChild;
-
-					// Fixes #12346
-					// Support: Webkit, IE
-					tmp.textContent = "";
-				}
-			}
-		}
-
-		// Remove wrapper from fragment
-		fragment.textContent = "";
-
-		i = 0;
-		while ( (elem = nodes[ i++ ]) ) {
-
-			// #4087 - If origin and destination elements are the same, and this is
-			// that element, do not do anything
-			if ( selection && jQuery.inArray( elem, selection ) !== -1 ) {
-				continue;
-			}
-
-			contains = jQuery.contains( elem.ownerDocument, elem );
-
-			// Append to fragment
-			tmp = getAll( fragment.appendChild( elem ), "script" );
-
-			// Preserve script evaluation history
-			if ( contains ) {
-				setGlobalEval( tmp );
-			}
-
-			// Capture executables
-			if ( scripts ) {
-				j = 0;
-				while ( (elem = tmp[ j++ ]) ) {
-					if ( rscriptType.test( elem.type || "" ) ) {
-						scripts.push( elem );
-					}
-				}
-			}
-		}
-
-		return fragment;
-	},
-
-	cleanData: function( elems ) {
-		var data, elem, type, key,
-			special = jQuery.event.special,
-			i = 0;
-
-		for ( ; (elem = elems[ i ]) !== undefined; i++ ) {
-			if ( jQuery.acceptData( elem ) ) {
-				key = elem[ data_priv.expando ];
-
-				if ( key && (data = data_priv.cache[ key ]) ) {
-					if ( data.events ) {
-						for ( type in data.events ) {
-							if ( special[ type ] ) {
-								jQuery.event.remove( elem, type );
-
-							// This is a shortcut to avoid jQuery.event.remove's overhead
-							} else {
-								jQuery.removeEvent( elem, type, data.handle );
-							}
-						}
-					}
-					if ( data_priv.cache[ key ] ) {
-						// Discard any remaining `private` data
-						delete data_priv.cache[ key ];
-					}
-				}
-			}
-			// Discard any remaining `user` data
-			delete data_user.cache[ elem[ data_user.expando ] ];
-		}
-	}
-});
-
-jQuery.fn.extend({
-	text: function( value ) {
-		return access( this, function( value ) {
-			return value === undefined ?
-				jQuery.text( this ) :
-				this.empty().each(function() {
-					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
-						this.textContent = value;
-					}
-				});
-		}, null, value, arguments.length );
-	},
-
-	append: function() {
-		return this.domManip( arguments, function( elem ) {
-			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
-				var target = manipulationTarget( this, elem );
-				target.appendChild( elem );
-			}
-		});
-	},
-
-	prepend: function() {
-		return this.domManip( arguments, function( elem ) {
-			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
-				var target = manipulationTarget( this, elem );
-				target.insertBefore( elem, target.firstChild );
-			}
-		});
-	},
-
-	before: function() {
-		return this.domManip( arguments, function( elem ) {
-			if ( this.parentNode ) {
-				this.parentNode.insertBefore( elem, this );
-			}
-		});
-	},
-
-	after: function() {
-		return this.domManip( arguments, function( elem ) {
-			if ( this.parentNode ) {
-				this.parentNode.insertBefore( elem, this.nextSibling );
-			}
-		});
-	},
-
-	remove: function( selector, keepData /* Internal Use Only */ ) {
-		var elem,
-			elems = selector ? jQuery.filter( selector, this ) : this,
-			i = 0;
-
-		for ( ; (elem = elems[i]) != null; i++ ) {
-			if ( !keepData && elem.nodeType === 1 ) {
-				jQuery.cleanData( getAll( elem ) );
-			}
-
-			if ( elem.parentNode ) {
-				if ( keepData && jQuery.contains( elem.ownerDocument, elem ) ) {
-					setGlobalEval( getAll( elem, "script" ) );
-				}
-				elem.parentNode.removeChild( elem );
-			}
-		}
-
-		return this;
-	},
-
-	empty: function() {
-		var elem,
-			i = 0;
-
-		for ( ; (elem = this[i]) != null; i++ ) {
-			if ( elem.nodeType === 1 ) {
-
-				// Prevent memory leaks
-				jQuery.cleanData( getAll( elem, false ) );
-
-				// Remove any remaining nodes
-				elem.textContent = "";
-			}
-		}
-
-		return this;
-	},
-
-	clone: function( dataAndEvents, deepDataAndEvents ) {
-		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
-		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
-
-		return this.map(function() {
-			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
-		});
-	},
-
-	html: function( value ) {
-		return access( this, function( value ) {
-			var elem = this[ 0 ] || {},
-				i = 0,
-				l = this.length;
-
-			if ( value === undefined && elem.nodeType === 1 ) {
-				return elem.innerHTML;
-			}
-
-			// See if we can take a shortcut and just use innerHTML
-			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
-				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
-
-				value = value.replace( rxhtmlTag, "<$1></$2>" );
-
-				try {
-					for ( ; i < l; i++ ) {
-						elem = this[ i ] || {};
-
-						// Remove element nodes and prevent memory leaks
-						if ( elem.nodeType === 1 ) {
-							jQuery.cleanData( getAll( elem, false ) );
-							elem.innerHTML = value;
-						}
-					}
-
-					elem = 0;
-
-				// If using innerHTML throws an exception, use the fallback method
-				} catch( e ) {}
-			}
-
-			if ( elem ) {
-				this.empty().append( value );
-			}
-		}, null, value, arguments.length );
-	},
-
-	replaceWith: function() {
-		var arg = arguments[ 0 ];
-
-		// Make the changes, replacing each context element with the new content
-		this.domManip( arguments, function( elem ) {
-			arg = this.parentNode;
-
-			jQuery.cleanData( getAll( this ) );
-
-			if ( arg ) {
-				arg.replaceChild( elem, this );
-			}
-		});
-
-		// Force removal if there was no new content (e.g., from empty arguments)
-		return arg && (arg.length || arg.nodeType) ? this : this.remove();
-	},
-
-	detach: function( selector ) {
-		return this.remove( selector, true );
-	},
-
-	domManip: function( args, callback ) {
-
-		// Flatten any nested arrays
-		args = concat.apply( [], args );
-
-		var fragment, first, scripts, hasScripts, node, doc,
-			i = 0,
-			l = this.length,
-			set = this,
-			iNoClone = l - 1,
-			value = args[ 0 ],
-			isFunction = jQuery.isFunction( value );
-
-		// We can't cloneNode fragments that contain checked, in WebKit
-		if ( isFunction ||
-				( l > 1 && typeof value === "string" &&
-					!support.checkClone && rchecked.test( value ) ) ) {
-			return this.each(function( index ) {
-				var self = set.eq( index );
-				if ( isFunction ) {
-					args[ 0 ] = value.call( this, index, self.html() );
-				}
-				self.domManip( args, callback );
-			});
-		}
-
-		if ( l ) {
-			fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, this );
-			first = fragment.firstChild;
-
-			if ( fragment.childNodes.length === 1 ) {
-				fragment = first;
-			}
-
-			if ( first ) {
-				scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
-				hasScripts = scripts.length;
-
-				// Use the original fragment for the last item instead of the first because it can end up
-				// being emptied incorrectly in certain situations (#8070).
-				for ( ; i < l; i++ ) {
-					node = fragment;
-
-					if ( i !== iNoClone ) {
-						node = jQuery.clone( node, true, true );
-
-						// Keep references to cloned scripts for later restoration
-						if ( hasScripts ) {
-							// Support: QtWebKit
-							// jQuery.merge because push.apply(_, arraylike) throws
-							jQuery.merge( scripts, getAll( node, "script" ) );
-						}
-					}
-
-					callback.call( this[ i ], node, i );
-				}
-
-				if ( hasScripts ) {
-					doc = scripts[ scripts.length - 1 ].ownerDocument;
-
-					// Reenable scripts
-					jQuery.map( scripts, restoreScript );
-
-					// Evaluate executable scripts on first document insertion
-					for ( i = 0; i < hasScripts; i++ ) {
-						node = scripts[ i ];
-						if ( rscriptType.test( node.type || "" ) &&
-							!data_priv.access( node, "globalEval" ) && jQuery.contains( doc, node ) ) {
-
-							if ( node.src ) {
-								// Optional AJAX dependency, but won't run scripts if not present
-								if ( jQuery._evalUrl ) {
-									jQuery._evalUrl( node.src );
-								}
-							} else {
-								jQuery.globalEval( node.textContent.replace( rcleanScript, "" ) );
-							}
-						}
-					}
-				}
-			}
-		}
-
-		return this;
-	}
-});
-
-jQuery.each({
-	appendTo: "append",
-	prependTo: "prepend",
-	insertBefore: "before",
-	insertAfter: "after",
-	replaceAll: "replaceWith"
-}, function( name, original ) {
-	jQuery.fn[ name ] = function( selector ) {
-		var elems,
-			ret = [],
-			insert = jQuery( selector ),
-			last = insert.length - 1,
-			i = 0;
-
-		for ( ; i <= last; i++ ) {
-			elems = i === last ? this : this.clone( true );
-			jQuery( insert[ i ] )[ original ]( elems );
-
-			// Support: QtWebKit
-			// .get() because push.apply(_, arraylike) throws
-			push.apply( ret, elems.get() );
-		}
-
-		return this.pushStack( ret );
-	};
-});
-
-
-var iframe,
-	elemdisplay = {};
-
-/**
- * Retrieve the actual display of a element
- * @param {String} name nodeName of the element
- * @param {Object} doc Document object
- */
-// Called only from within defaultDisplay
-function actualDisplay( name, doc ) {
-	var style,
-		elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),
-
-		// getDefaultComputedStyle might be reliably used only on attached element
-		display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?
-
-			// Use of this method is a temporary fix (more like optmization) until something better comes along,
-			// since it was removed from specification and supported only in FF
-			style.display : jQuery.css( elem[ 0 ], "display" );
-
-	// We don't have any data stored on the element,
-	// so use "detach" method as fast way to get rid of the element
-	elem.detach();
-
-	return display;
-}
-
-/**
- * Try to determine the default display value of an element
- * @param {String} nodeName
- */
-function defaultDisplay( nodeName ) {
-	var doc = document,
-		display = elemdisplay[ nodeName ];
-
-	if ( !display ) {
-		display = actualDisplay( nodeName, doc );
-
-		// If the simple way fails, read from inside an iframe
-		if ( display === "none" || !display ) {
-
-			// Use the already-created iframe if possible
-			iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );
-
-			// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
-			doc = iframe[ 0 ].contentDocument;
-
-			// Support: IE
-			doc.write();
-			doc.close();
-
-			display = actualDisplay( nodeName, doc );
-			iframe.detach();
-		}
-
-		// Store the correct default display
-		elemdisplay[ nodeName ] = display;
-	}
-
-	return display;
-}
-var rmargin = (/^margin/);
-
-var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
-
-var getStyles = function( elem ) {
-		return elem.ownerDocument.defaultView.getComputedStyle( elem, null );
-	};
-
-
-
-function curCSS( elem, name, computed ) {
-	var width, minWidth, maxWidth, ret,
-		style = elem.style;
-
-	computed = computed || getStyles( elem );
-
-	// Support: IE9
-	// getPropertyValue is only needed for .css('filter') in IE9, see #12537
-	if ( computed ) {
-		ret = computed.getPropertyValue( name ) || computed[ name ];
-	}
-
-	if ( computed ) {
-
-		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
-			ret = jQuery.style( elem, name );
-		}
-
-		// Support: iOS < 6
-		// A tribute to the "awesome hack by Dean Edwards"
-		// iOS < 6 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
-		// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
-		if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {
-
-			// Remember the original values
-			width = style.width;
-			minWidth = style.minWidth;
-			maxWidth = style.maxWidth;
-
-			// Put in the new values to get a computed value out
-			style.minWidth = style.maxWidth = style.width = ret;
-			ret = computed.width;
-
-			// Revert the changed values
-			style.width = width;
-			style.minWidth = minWidth;
-			style.maxWidth = maxWidth;
-		}
-	}
-
-	return ret !== undefined ?
-		// Support: IE
-		// IE returns zIndex value as an integer.
-		ret + "" :
-		ret;
-}
-
-
-function addGetHookIf( conditionFn, hookFn ) {
-	// Define the hook, we'll check on the first run if it's really needed.
-	return {
-		get: function() {
-			if ( conditionFn() ) {
-				// Hook not needed (or it's not possible to use it due to missing dependency),
-				// remove it.
-				// Since there are no other hooks for marginRight, remove the whole object.
-				delete this.get;
-				return;
-			}
-
-			// Hook needed; redefine it so that the support test is not executed again.
-
-			return (this.get = hookFn).apply( this, arguments );
-		}
-	};
-}
-
-
-(function() {
-	var pixelPositionVal, boxSizingReliableVal,
-		docElem = document.documentElement,
-		container = document.createElement( "div" ),
-		div = document.createElement( "div" );
-
-	if ( !div.style ) {
-		return;
-	}
-
-	div.style.backgroundClip = "content-box";
-	div.cloneNode( true ).style.backgroundClip = "";
-	support.clearCloneStyle = div.style.backgroundClip === "content-box";
-
-	container.style.cssText = "border:0;width:0;height:0;top:0;left:-9999px;margin-top:1px;" +
-		"position:absolute";
-	container.appendChild( div );
-
-	// Executing both pixelPosition & boxSizingReliable tests require only one layout
-	// so they're executed at the same time to save the second computation.
-	function computePixelPositionAndBoxSizingReliable() {
-		div.style.cssText =
-			// Support: Firefox<29, Android 2.3
-			// Vendor-prefix box-sizing
-			"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;" +
-			"box-sizing:border-box;display:block;margin-top:1%;top:1%;" +
-			"border:1px;padding:1px;width:4px;position:absolute";
-		div.innerHTML = "";
-		docElem.appendChild( container );
-
-		var divStyle = window.getComputedStyle( div, null );
-		pixelPositionVal = divStyle.top !== "1%";
-		boxSizingReliableVal = divStyle.width === "4px";
-
-		docElem.removeChild( container );
-	}
-
-	// Support: node.js jsdom
-	// Don't assume that getComputedStyle is a property of the global object
-	if ( window.getComputedStyle ) {
-		jQuery.extend( support, {
-			pixelPosition: function() {
-				// This test is executed only once but we still do memoizing
-				// since we can use the boxSizingReliable pre-computing.
-				// No need to check if the test was already performed, though.
-				computePixelPositionAndBoxSizingReliable();
-				return pixelPositionVal;
-			},
-			boxSizingReliable: function() {
-				if ( boxSizingReliableVal == null ) {
-					computePixelPositionAndBoxSizingReliable();
-				}
-				return boxSizingReliableVal;
-			},
-			reliableMarginRight: function() {
-				// Support: Android 2.3
-				// Check if div with explicit width and no margin-right incorrectly
-				// gets computed margin-right based on width of container. (#3333)
-				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
-				// This support function is only executed once so no memoizing is needed.
-				var ret,
-					marginDiv = div.appendChild( document.createElement( "div" ) );
-
-				// Reset CSS: box-sizing; display; margin; border; padding
-				marginDiv.style.cssText = div.style.cssText =
-					// Support: Firefox<29, Android 2.3
-					// Vendor-prefix box-sizing
-					"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;" +
-					"box-sizing:content-box;display:block;margin:0;border:0;padding:0";
-				marginDiv.style.marginRight = marginDiv.style.width = "0";
-				div.style.width = "1px";
-				docElem.appendChild( container );
-
-				ret = !parseFloat( window.getComputedStyle( marginDiv, null ).marginRight );
-
-				docElem.removeChild( container );
-
-				return ret;
-			}
-		});
-	}
-})();
-
-
-// A method for quickly swapping in/out CSS properties to get correct calculations.
-jQuery.swap = function( elem, options, callback, args ) {
-	var ret, name,
-		old = {};
-
-	// Remember the old values, and insert the new ones
-	for ( name in options ) {
-		old[ name ] = elem.style[ name ];
-		elem.style[ name ] = options[ name ];
-	}
-
-	ret = callback.apply( elem, args || [] );
-
-	// Revert the old values
-	for ( name in options ) {
-		elem.style[ name ] = old[ name ];
-	}
-
-	return ret;
-};
-
-
-var
-	// swappable if display is none or starts with table except "table", "table-cell", or "table-caption"
-	// see here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
-	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
-	rnumsplit = new RegExp( "^(" + pnum + ")(.*)$", "i" ),
-	rrelNum = new RegExp( "^([+-])=(" + pnum + ")", "i" ),
-
-	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
-	cssNormalTransform = {
-		letterSpacing: "0",
-		fontWeight: "400"
-	},
-
-	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];
-
-// return a css property mapped to a potentially vendor prefixed property
-function vendorPropName( style, name ) {
-
-	// shortcut for names that are not vendor prefixed
-	if ( name in style ) {
-		return name;
-	}
-
-	// check for vendor prefixed names
-	var capName = name[0].toUpperCase() + name.slice(1),
-		origName = name,
-		i = cssPrefixes.length;
-
-	while ( i-- ) {
-		name = cssPrefixes[ i ] + capName;
-		if ( name in style ) {
-			return name;
-		}
-	}
-
-	return origName;
-}
-
-function setPositiveNumber( elem, value, subtract ) {
-	var matches = rnumsplit.exec( value );
-	return matches ?
-		// Guard against undefined "subtract", e.g., when used as in cssHooks
-		Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
-		value;
-}
-
-function augmentWidthOrHeight( elem, name, extra, isBorderBox, styles ) {
-	var i = extra === ( isBorderBox ? "border" : "content" ) ?
-		// If we already have the right measurement, avoid augmentation
-		4 :
-		// Otherwise initialize for horizontal or vertical properties
-		name === "width" ? 1 : 0,
-
-		val = 0;
-
-	for ( ; i < 4; i += 2 ) {
-		// both box models exclude margin, so add it if we want it
-		if ( extra === "margin" ) {
-			val += jQuery.css( elem, extra + cssExpand[ i ], true, styles );
-		}
-
-		if ( isBorderBox ) {
-			// border-box includes padding, so remove it if we want content
-			if ( extra === "content" ) {
-				val -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
-			}
-
-			// at this point, extra isn't border nor margin, so remove border
-			if ( extra !== "margin" ) {
-				val -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
-			}
-		} else {
-			// at this point, extra isn't content, so add padding
-			val += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
-
-			// at this point, extra isn't content nor padding, so add border
-			if ( extra !== "padding" ) {
-				val += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
-			}
-		}
-	}
-
-	return val;
-}
-
-function getWidthOrHeight( elem, name, extra ) {
-
-	// Start with offset property, which is equivalent to the border-box value
-	var valueIsBorderBox = true,
-		val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
-		styles = getStyles( elem ),
-		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
-
-	// some non-html elements return undefined for offsetWidth, so check for null/undefined
-	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
-	// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
-	if ( val <= 0 || val == null ) {
-		// Fall back to computed then uncomputed css if necessary
-		val = curCSS( elem, name, styles );
-		if ( val < 0 || val == null ) {
-			val = elem.style[ name ];
-		}
-
-		// Computed unit is not pixels. Stop here and return.
-		if ( rnumnonpx.test(val) ) {
-			return val;
-		}
-
-		// we need the check for style in case a browser which returns unreliable values
-		// for getComputedStyle silently falls back to the reliable elem.style
-		valueIsBorderBox = isBorderBox &&
-			( support.boxSizingReliable() || val === elem.style[ name ] );
-
-		// Normalize "", auto, and prepare for extra
-		val = parseFloat( val ) || 0;
-	}
-
-	// use the active box-sizing model to add/subtract irrelevant styles
-	return ( val +
-		augmentWidthOrHeight(
-			elem,
-			name,
-			extra || ( isBorderBox ? "border" : "content" ),
-			valueIsBorderBox,
-			styles
-		)
-	) + "px";
-}
-
-function showHide( elements, show ) {
-	var display, elem, hidden,
-		values = [],
-		index = 0,
-		length = elements.length;
-
-	for ( ; index < length; index++ ) {
-		elem = elements[ index ];
-		if ( !elem.style ) {
-			continue;
-		}
-
-		values[ index ] = data_priv.get( elem, "olddisplay" );
-		display = elem.style.display;
-		if ( show ) {
-			// Reset the inline display of this element to learn if it is
-			// being hidden by cascaded rules or not
-			if ( !values[ index ] && display === "none" ) {
-				elem.style.display = "";
-			}
-
-			// Set elements which have been overridden with display: none
-			// in a stylesheet to whatever the default browser style is
-			// for such an element
-			if ( elem.style.display === "" && isHidden( elem ) ) {
-				values[ index ] = data_priv.access( elem, "olddisplay", defaultDisplay(elem.nodeName) );
-			}
-		} else {
-			hidden = isHidden( elem );
-
-			if ( display !== "none" || !hidden ) {
-				data_priv.set( elem, "olddisplay", hidden ? display : jQuery.css( elem, "display" ) );
-			}
-		}
-	}
-
-	// Set the display of most of the elements in a second loop
-	// to avoid the constant reflow
-	for ( index = 0; index < length; index++ ) {
-		elem = elements[ index ];
-		if ( !elem.style ) {
-			continue;
-		}
-		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
-			elem.style.display = show ? values[ index ] || "" : "none";
-		}
-	}
-
-	return elements;
-}
-
-jQuery.extend({
-	// Add in style property hooks for overriding the default
-	// behavior of getting and setting a style property
-	cssHooks: {
-		opacity: {
-			get: function( elem, computed ) {
-				if ( computed ) {
-					// We should always get a number back from opacity
-					var ret = curCSS( elem, "opacity" );
-					return ret === "" ? "1" : ret;
-				}
-			}
-		}
-	},
-
-	// Don't automatically add "px" to these possibly-unitless properties
-	cssNumber: {
-		"columnCount": true,
-		"fillOpacity": true,
-		"flexGrow": true,
-		"flexShrink": true,
-		"fontWeight": true,
-		"lineHeight": true,
-		"opacity": true,
-		"order": true,
-		"orphans": true,
-		"widows": true,
-		"zIndex": true,
-		"zoom": true
-	},
-
-	// Add in properties whose names you wish to fix before
-	// setting or getting the value
-	cssProps: {
-		// normalize float css property
-		"float": "cssFloat"
-	},
-
-	// Get and set the style property on a DOM Node
-	style: function( elem, name, value, extra ) {
-		// Don't set styles on text and comment nodes
-		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
-			return;
-		}
-
-		// Make sure that we're working with the right name
-		var ret, type, hooks,
-			origName = jQuery.camelCase( name ),
-			style = elem.style;
-
-		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( style, origName ) );
-
-		// gets hook for the prefixed version
-		// followed by the unprefixed version
-		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
-
-		// Check if we're setting a value
-		if ( value !== undefined ) {
-			type = typeof value;
-
-			// convert relative number strings (+= or -=) to relative numbers. #7345
-			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
-				value = ( ret[1] + 1 ) * ret[2] + parseFloat( jQuery.css( elem, name ) );
-				// Fixes bug #9237
-				type = "number";
-			}
-
-			// Make sure that null and NaN values aren't set. See: #7116
-			if ( value == null || value !== value ) {
-				return;
-			}
-
-			// If a number was passed in, add 'px' to the (except for certain CSS properties)
-			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
-				value += "px";
-			}
-
-			// Fixes #8908, it can be done more correctly by specifying setters in cssHooks,
-			// but it would mean to define eight (for every problematic property) identical functions
-			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
-				style[ name ] = "inherit";
-			}
-
-			// If a hook was provided, use that value, otherwise just set the specified value
-			if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value, extra )) !== undefined ) {
-				style[ name ] = value;
-			}
-
-		} else {
-			// If a hook was provided get the non-computed value from there
-			if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
-				return ret;
-			}
-
-			// Otherwise just get the value from the style object
-			return style[ name ];
-		}
-	},
-
-	css: function( elem, name, extra, styles ) {
-		var val, num, hooks,
-			origName = jQuery.camelCase( name );
-
-		// Make sure that we're working with the right name
-		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( elem.style, origName ) );
-
-		// gets hook for the prefixed version
-		// followed by the unprefixed version
-		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
-
-		// If a hook was provided get the computed value from there
-		if ( hooks && "get" in hooks ) {
-			val = hooks.get( elem, true, extra );
-		}
-
-		// Otherwise, if a way to get the computed value exists, use that
-		if ( val === undefined ) {
-			val = curCSS( elem, name, styles );
-		}
-
-		//convert "normal" to computed value
-		if ( val === "normal" && name in cssNormalTransform ) {
-			val = cssNormalTransform[ name ];
-		}
-
-		// Return, converting to number if forced or a qualifier was provided and val looks numeric
-		if ( extra === "" || extra ) {
-			num = parseFloat( val );
-			return extra === true || jQuery.isNumeric( num ) ? num || 0 : val;
-		}
-		return val;
-	}
-});
-
-jQuery.each([ "height", "width" ], function( i, name ) {
-	jQuery.cssHooks[ name ] = {
-		get: function( elem, computed, extra ) {
-			if ( computed ) {
-				// certain elements can have dimension info if we invisibly show them
-				// however, it must have a current display style that would benefit from this
-				return rdisplayswap.test( jQuery.css( elem, "display" ) ) && elem.offsetWidth === 0 ?
-					jQuery.swap( elem, cssShow, function() {
-						return getWidthOrHeight( elem, name, extra );
-					}) :
-					getWidthOrHeight( elem, name, extra );
-			}
-		},
-
-		set: function( elem, value, extra ) {
-			var styles = extra && getStyles( elem );
-			return setPositiveNumber( elem, value, extra ?
-				augmentWidthOrHeight(
-					elem,
-					name,
-					extra,
-					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
-					styles
-				) : 0
-			);
-		}
-	};
-});
-
-// Support: Android 2.3
-jQuery.cssHooks.marginRight = addGetHookIf( support.reliableMarginRight,
-	function( elem, computed ) {
-		if ( computed ) {
-			// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
-			// Work around by temporarily setting element display to inline-block
-			return jQuery.swap( elem, { "display": "inline-block" },
-				curCSS, [ elem, "marginRight" ] );
-		}
-	}
-);
-
-// These hooks are used by animate to expand properties
-jQuery.each({
-	margin: "",
-	padding: "",
-	border: "Width"
-}, function( prefix, suffix ) {
-	jQuery.cssHooks[ prefix + suffix ] = {
-		expand: function( value ) {
-			var i = 0,
-				expanded = {},
-
-				// assumes a single number if not a string
-				parts = typeof value === "string" ? value.split(" ") : [ value ];
-
-			for ( ; i < 4; i++ ) {
-				expanded[ prefix + cssExpand[ i ] + suffix ] =
-					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
-			}
-
-			return expanded;
-		}
-	};
-
-	if ( !rmargin.test( prefix ) ) {
-		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
-	}
-});
-
-jQuery.fn.extend({
-	css: function( name, value ) {
-		return access( this, function( elem, name, value ) {
-			var styles, len,
-				map = {},
-				i = 0;
-
-			if ( jQuery.isArray( name ) ) {
-				styles = getStyles( elem );
-				len = name.length;
-
-				for ( ; i < len; i++ ) {
-					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
-				}
-
-				return map;
-			}
-
-			return value !== undefined ?
-				jQuery.style( elem, name, value ) :
-				jQuery.css( elem, name );
-		}, name, value, arguments.length > 1 );
-	},
-	show: function() {
-		return showHide( this, true );
-	},
-	hide: function() {
-		return showHide( this );
-	},
-	toggle: function( state ) {
-		if ( typeof state === "boolean" ) {
-			return state ? this.show() : this.hide();
-		}
-
-		return this.each(function() {
-			if ( isHidden( this ) ) {
-				jQuery( this ).show();
-			} else {
-				jQuery( this ).hide();
-			}
-		});
-	}
-});
-
-
-function Tween( elem, options, prop, end, easing ) {
-	return new Tween.prototype.init( elem, options, prop, end, easing );
-}
-jQuery.Tween = Tween;
-
-Tween.prototype = {
-	constructor: Tween,
-	init: function( elem, options, prop, end, easing, unit ) {
-		this.elem = elem;
-		this.prop = prop;
-		this.easing = easing || "swing";
-		this.options = options;
-		this.start = this.now = this.cur();
-		this.end = end;
-		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
-	},
-	cur: function() {
-		var hooks = Tween.propHooks[ this.prop ];
-
-		return hooks && hooks.get ?
-			hooks.get( this ) :
-			Tween.propHooks._default.get( this );
-	},
-	run: function( percent ) {
-		var eased,
-			hooks = Tween.propHooks[ this.prop ];
-
-		if ( this.options.duration ) {
-			this.pos = eased = jQuery.easing[ this.easing ](
-				percent, this.options.duration * percent, 0, 1, this.options.duration
-			);
-		} else {
-			this.pos = eased = percent;
-		}
-		this.now = ( this.end - this.start ) * eased + this.start;
-
-		if ( this.options.step ) {
-			this.options.step.call( this.elem, this.now, this );
-		}
-
-		if ( hooks && hooks.set ) {
-			hooks.set( this );
-		} else {
-			Tween.propHooks._default.set( this );
-		}
-		return this;
-	}
-};
-
-Tween.prototype.init.prototype = Tween.prototype;
-
-Tween.propHooks = {
-	_default: {
-		get: function( tween ) {
-			var result;
-
-			if ( tween.elem[ tween.prop ] != null &&
-				(!tween.elem.style || tween.elem.style[ tween.prop ] == null) ) {
-				return tween.elem[ tween.prop ];
-			}
-
-			// passing an empty string as a 3rd parameter to .css will automatically
-			// attempt a parseFloat and fallback to a string if the parse fails
-			// so, simple values such as "10px" are parsed to Float.
-			// complex values such as "rotate(1rad)" are returned as is.
-			result = jQuery.css( tween.elem, tween.prop, "" );
-			// Empty strings, null, undefined and "auto" are converted to 0.
-			return !result || result === "auto" ? 0 : result;
-		},
-		set: function( tween ) {
-			// use step hook for back compat - use cssHook if its there - use .style if its
-			// available and use plain properties where available
-			if ( jQuery.fx.step[ tween.prop ] ) {
-				jQuery.fx.step[ tween.prop ]( tween );
-			} else if ( tween.elem.style && ( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null || jQuery.cssHooks[ tween.prop ] ) ) {
-				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
-			} else {
-				tween.elem[ tween.prop ] = tween.now;
-			}
-		}
-	}
-};
-
-// Support: IE9
-// Panic based approach to setting things on disconnected nodes
-
-Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
-	set: function( tween ) {
-		if ( tween.elem.nodeType && tween.elem.parentNode ) {
-			tween.elem[ tween.prop ] = tween.now;
-		}
-	}
-};
-
-jQuery.easing = {
-	linear: function( p ) {
-		return p;
-	},
-	swing: function( p ) {
-		return 0.5 - Math.cos( p * Math.PI ) / 2;
-	}
-};
-
-jQuery.fx = Tween.prototype.init;
-
-// Back Compat <1.8 extension point
-jQuery.fx.step = {};
-
-
-
-
-var
-	fxNow, timerId,
-	rfxtypes = /^(?:toggle|show|hide)$/,
-	rfxnum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" ),
-	rrun = /queueHooks$/,
-	animationPrefilters = [ defaultPrefilter ],
-	tweeners = {
-		"*": [ function( prop, value ) {
-			var tween = this.createTween( prop, value ),
-				target = tween.cur(),
-				parts = rfxnum.exec( value ),
-				unit = parts && parts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
-
-				// Starting value computation is required for potential unit mismatches
-				start = ( jQuery.cssNumber[ prop ] || unit !== "px" && +target ) &&
-					rfxnum.exec( jQuery.css( tween.elem, prop ) ),
-				scale = 1,
-				maxIterations = 20;
-
-			if ( start && start[ 3 ] !== unit ) {
-				// Trust units reported by jQuery.css
-				unit = unit || start[ 3 ];
-
-				// Make sure we update the tween properties later on
-				parts = parts || [];
-
-				// Iteratively approximate from a nonzero starting point
-				start = +target || 1;
-
-				do {
-					// If previous iteration zeroed out, double until we get *something*
-					// Use a string for doubling factor so we don't accidentally see scale as unchanged below
-					scale = scale || ".5";
-
-					// Adjust and apply
-					start = start / scale;
-					jQuery.style( tween.elem, prop, start + unit );
-
-				// Update scale, tolerating zero or NaN from tween.cur()
-				// And breaking the loop if scale is unchanged or perfect, or if we've just had enough
-				} while ( scale !== (scale = tween.cur() / target) && scale !== 1 && --maxIterations );
-			}
-
-			// Update tween properties
-			if ( parts ) {
-				start = tween.start = +start || +target || 0;
-				tween.unit = unit;
-				// If a +=/-= token was provided, we're doing a relative animation
-				tween.end = parts[ 1 ] ?
-					start + ( parts[ 1 ] + 1 ) * parts[ 2 ] :
-					+parts[ 2 ];
-			}
-
-			return tween;
-		} ]
-	};
-
-// Animations created synchronously will run synchronously
-function createFxNow() {
-	setTimeout(function() {
-		fxNow = undefined;
-	});
-	return ( fxNow = jQuery.now() );
-}
-
-// Generate parameters to create a standard animation
-function genFx( type, includeWidth ) {
-	var which,
-		i = 0,
-		attrs = { height: type };
-
-	// if we include width, step value is 1 to do all cssExpand values,
-	// if we don't include width, step value is 2 to skip over Left and Right
-	includeWidth = includeWidth ? 1 : 0;
-	for ( ; i < 4 ; i += 2 - includeWidth ) {
-		which = cssExpand[ i ];
-		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
-	}
-
-	if ( includeWidth ) {
-		attrs.opacity = attrs.width = type;
-	}
-
-	return attrs;
-}
-
-function createTween( value, prop, animation ) {
-	var tween,
-		collection = ( tweeners[ prop ] || [] ).concat( tweeners[ "*" ] ),
-		index = 0,
-		length = collection.length;
-	for ( ; index < length; index++ ) {
-		if ( (tween = collection[ index ].call( animation, prop, value )) ) {
-
-			// we're done with this property
-			return tween;
-		}
-	}
-}
-
-function defaultPrefilter( elem, props, opts ) {
-	/* jshint validthis: true */
-	var prop, value, toggle, tween, hooks, oldfire, display, checkDisplay,
-		anim = this,
-		orig = {},
-		style = elem.style,
-		hidden = elem.nodeType && isHidden( elem ),
-		dataShow = data_priv.get( elem, "fxshow" );
-
-	// handle queue: false promises
-	if ( !opts.queue ) {
-		hooks = jQuery._queueHooks( elem, "fx" );
-		if ( hooks.unqueued == null ) {
-			hooks.unqueued = 0;
-			oldfire = hooks.empty.fire;
-			hooks.empty.fire = function() {
-				if ( !hooks.unqueued ) {
-					oldfire();
-				}
-			};
-		}
-		hooks.unqueued++;
-
-		anim.always(function() {
-			// doing this makes sure that the complete handler will be called
-			// before this completes
-			anim.always(function() {
-				hooks.unqueued--;
-				if ( !jQuery.queue( elem, "fx" ).length ) {
-					hooks.empty.fire();
-				}
-			});
-		});
-	}
-
-	// height/width overflow pass
-	if ( elem.nodeType === 1 && ( "height" in props || "width" in props ) ) {
-		// Make sure that nothing sneaks out
-		// Record all 3 overflow attributes because IE9-10 do not
-		// change the overflow attribute when overflowX and
-		// overflowY are set to the same value
-		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
-
-		// Set display property to inline-block for height/width
-		// animations on inline elements that are having width/height animated
-		display = jQuery.css( elem, "display" );
-
-		// Test default display if display is currently "none"
-		checkDisplay = display === "none" ?
-			data_priv.get( elem, "olddisplay" ) || defaultDisplay( elem.nodeName ) : display;
-
-		if ( checkDisplay === "inline" && jQuery.css( elem, "float" ) === "none" ) {
-			style.display = "inline-block";
-		}
-	}
-
-	if ( opts.overflow ) {
-		style.overflow = "hidden";
-		anim.always(function() {
-			style.overflow = opts.overflow[ 0 ];
-			style.overflowX = opts.overflow[ 1 ];
-			style.overflowY = opts.overflow[ 2 ];
-		});
-	}
-
-	// show/hide pass
-	for ( prop in props ) {
-		value = props[ prop ];
-		if ( rfxtypes.exec( value ) ) {
-			delete props[ prop ];
-			toggle = toggle || value === "toggle";
-			if ( value === ( hidden ? "hide" : "show" ) ) {
-
-				// If there is dataShow left over from a stopped hide or show and we are going to proceed with show, we should pretend to be hidden
-				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
-					hidden = true;
-				} else {
-					continue;
-				}
-			}
-			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
-
-		// Any non-fx value stops us from restoring the original display value
-		} else {
-			display = undefined;
-		}
-	}
-
-	if ( !jQuery.isEmptyObject( orig ) ) {
-		if ( dataShow ) {
-			if ( "hidden" in dataShow ) {
-				hidden = dataShow.hidden;
-			}
-		} else {
-			dataShow = data_priv.access( elem, "fxshow", {} );
-		}
-
-		// store state if its toggle - enables .stop().toggle() to "reverse"
-		if ( toggle ) {
-			dataShow.hidden = !hidden;
-		}
-		if ( hidden ) {
-			jQuery( elem ).show();
-		} else {
-			anim.done(function() {
-				jQuery( elem ).hide();
-			});
-		}
-		anim.done(function() {
-			var prop;
-
-			data_priv.remove( elem, "fxshow" );
-			for ( prop in orig ) {
-				jQuery.style( elem, prop, orig[ prop ] );
-			}
-		});
-		for ( prop in orig ) {
-			tween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );
-
-			if ( !( prop in dataShow ) ) {
-				dataShow[ prop ] = tween.start;
-				if ( hidden ) {
-					tween.end = tween.start;
-					tween.start = prop === "width" || prop === "height" ? 1 : 0;
-				}
-			}
-		}
-
-	// If this is a noop like .hide().hide(), restore an overwritten display value
-	} else if ( (display === "none" ? defaultDisplay( elem.nodeName ) : display) === "inline" ) {
-		style.display = display;
-	}
-}
-
-function propFilter( props, specialEasing ) {
-	var index, name, easing, value, hooks;
-
-	// camelCase, specialEasing and expand cssHook pass
-	for ( index in props ) {
-		name = jQuery.camelCase( index );
-		easing = specialEasing[ name ];
-		value = props[ index ];
-		if ( jQuery.isArray( value ) ) {
-			easing = value[ 1 ];
-			value = props[ index ] = value[ 0 ];
-		}
-
-		if ( index !== name ) {
-			props[ name ] = value;
-			delete props[ index ];
-		}
-
-		hooks = jQuery.cssHooks[ name ];
-		if ( hooks && "expand" in hooks ) {
-			value = hooks.expand( value );
-			delete props[ name ];
-
-			// not quite $.extend, this wont overwrite keys already present.
-			// also - reusing 'index' from above because we have the correct "name"
-			for ( index in value ) {
-				if ( !( index in props ) ) {
-					props[ index ] = value[ index ];
-					specialEasing[ index ] = easing;
-				}
-			}
-		} else {
-			specialEasing[ name ] = easing;
-		}
-	}
-}
-
-function Animation( elem, properties, options ) {
-	var result,
-		stopped,
-		index = 0,
-		length = animationPrefilters.length,
-		deferred = jQuery.Deferred().always( function() {
-			// don't match elem in the :animated selector
-			delete tick.elem;
-		}),
-		tick = function() {
-			if ( stopped ) {
-				return false;
-			}
-			var currentTime = fxNow || createFxNow(),
-				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
-				// archaic crash bug won't allow us to use 1 - ( 0.5 || 0 ) (#12497)
-				temp = remaining / animation.duration || 0,
-				percent = 1 - temp,
-				index = 0,
-				length = animation.tweens.length;
-
-			for ( ; index < length ; index++ ) {
-				animation.tweens[ index ].run( percent );
-			}
-
-			deferred.notifyWith( elem, [ animation, percent, remaining ]);
-
-			if ( percent < 1 && length ) {
-				return remaining;
-			} else {
-				deferred.resolveWith( elem, [ animation ] );
-				return false;
-			}
-		},
-		animation = deferred.promise({
-			elem: elem,
-			props: jQuery.extend( {}, properties ),
-			opts: jQuery.extend( true, { specialEasing: {} }, options ),
-			originalProperties: properties,
-			originalOptions: options,
-			startTime: fxNow || createFxNow(),
-			duration: options.duration,
-			tweens: [],
-			createTween: function( prop, end ) {
-				var tween = jQuery.Tween( elem, animation.opts, prop, end,
-						animation.opts.specialEasing[ prop ] || animation.opts.easing );
-				animation.tweens.push( tween );
-				return tween;
-			},
-			stop: function( gotoEnd ) {
-				var index = 0,
-					// if we are going to the end, we want to run all the tweens
-					// otherwise we skip this part
-					length = gotoEnd ? animation.tweens.length : 0;
-				if ( stopped ) {
-					return this;
-				}
-				stopped = true;
-				for ( ; index < length ; index++ ) {
-					animation.tweens[ index ].run( 1 );
-				}
-
-				// resolve when we played the last frame
-				// otherwise, reject
-				if ( gotoEnd ) {
-					deferred.resolveWith( elem, [ animation, gotoEnd ] );
-				} else {
-					deferred.rejectWith( elem, [ animation, gotoEnd ] );
-				}
-				return this;
-			}
-		}),
-		props = animation.props;
-
-	propFilter( props, animation.opts.specialEasing );
-
-	for ( ; index < length ; index++ ) {
-		result = animationPrefilters[ index ].call( animation, elem, props, animation.opts );
-		if ( result ) {
-			return result;
-		}
-	}
-
-	jQuery.map( props, createTween, animation );
-
-	if ( jQuery.isFunction( animation.opts.start ) ) {
-		animation.opts.start.call( elem, animation );
-	}
-
-	jQuery.fx.timer(
-		jQuery.extend( tick, {
-			elem: elem,
-			anim: animation,
-			queue: animation.opts.queue
-		})
-	);
-
-	// attach callbacks from options
-	return animation.progress( animation.opts.progress )
-		.done( animation.opts.done, animation.opts.complete )
-		.fail( animation.opts.fail )
-		.always( animation.opts.always );
-}
-
-jQuery.Animation = jQuery.extend( Animation, {
-
-	tweener: function( props, callback ) {
-		if ( jQuery.isFunction( props ) ) {
-			callback = props;
-			props = [ "*" ];
-		} else {
-			props = props.split(" ");
-		}
-
-		var prop,
-			index = 0,
-			length = props.length;
-
-		for ( ; index < length ; index++ ) {
-			prop = props[ index ];
-			tweeners[ prop ] = tweeners[ prop ] || [];
-			tweeners[ prop ].unshift( callback );
-		}
-	},
-
-	prefilter: function( callback, prepend ) {
-		if ( prepend ) {
-			animationPrefilters.unshift( callback );
-		} else {
-			animationPrefilters.push( callback );
-		}
-	}
-});
-
-jQuery.speed = function( speed, easing, fn ) {
-	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
-		complete: fn || !fn && easing ||
-			jQuery.isFunction( speed ) && speed,
-		duration: speed,
-		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
-	};
-
-	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
-		opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
-
-	// normalize opt.queue - true/undefined/null -> "fx"
-	if ( opt.queue == null || opt.queue === true ) {
-		opt.queue = "fx";
-	}
-
-	// Queueing
-	opt.old = opt.complete;
-
-	opt.complete = function() {
-		if ( jQuery.isFunction( opt.old ) ) {
-			opt.old.call( this );
-		}
-
-		if ( opt.queue ) {
-			jQuery.dequeue( this, opt.queue );
-		}
-	};
-
-	return opt;
-};
-
-jQuery.fn.extend({
-	fadeTo: function( speed, to, easing, callback ) {
-
-		// show any hidden elements after setting opacity to 0
-		return this.filter( isHidden ).css( "opacity", 0 ).show()
-
-			// animate to the value specified
-			.end().animate({ opacity: to }, speed, easing, callback );
-	},
-	animate: function( prop, speed, easing, callback ) {
-		var empty = jQuery.isEmptyObject( prop ),
-			optall = jQuery.speed( speed, easing, callback ),
-			doAnimation = function() {
-				// Operate on a copy of prop so per-property easing won't be lost
-				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
-
-				// Empty animations, or finishing resolves immediately
-				if ( empty || data_priv.get( this, "finish" ) ) {
-					anim.stop( true );
-				}
-			};
-			doAnimation.finish = doAnimation;
-
-		return empty || optall.queue === false ?
-			this.each( doAnimation ) :
-			this.queue( optall.queue, doAnimation );
-	},
-	stop: function( type, clearQueue, gotoEnd ) {
-		var stopQueue = function( hooks ) {
-			var stop = hooks.stop;
-			delete hooks.stop;
-			stop( gotoEnd );
-		};
-
-		if ( typeof type !== "string" ) {
-			gotoEnd = clearQueue;
-			clearQueue = type;
-			type = undefined;
-		}
-		if ( clearQueue && type !== false ) {
-			this.queue( type || "fx", [] );
-		}
-
-		return this.each(function() {
-			var dequeue = true,
-				index = type != null && type + "queueHooks",
-				timers = jQuery.timers,
-				data = data_priv.get( this );
-
-			if ( index ) {
-				if ( data[ index ] && data[ index ].stop ) {
-					stopQueue( data[ index ] );
-				}
-			} else {
-				for ( index in data ) {
-					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
-						stopQueue( data[ index ] );
-					}
-				}
-			}
-
-			for ( index = timers.length; index--; ) {
-				if ( timers[ index ].elem === this && (type == null || timers[ index ].queue === type) ) {
-					timers[ index ].anim.stop( gotoEnd );
-					dequeue = false;
-					timers.splice( index, 1 );
-				}
-			}
-
-			// start the next in the queue if the last step wasn't forced
-			// timers currently will call their complete callbacks, which will dequeue
-			// but only if they were gotoEnd
-			if ( dequeue || !gotoEnd ) {
-				jQuery.dequeue( this, type );
-			}
-		});
-	},
-	finish: function( type ) {
-		if ( type !== false ) {
-			type = type || "fx";
-		}
-		return this.each(function() {
-			var index,
-				data = data_priv.get( this ),
-				queue = data[ type + "queue" ],
-				hooks = data[ type + "queueHooks" ],
-				timers = jQuery.timers,
-				length = queue ? queue.length : 0;
-
-			// enable finishing flag on private data
-			data.finish = true;
-
-			// empty the queue first
-			jQuery.queue( this, type, [] );
-
-			if ( hooks && hooks.stop ) {
-				hooks.stop.call( this, true );
-			}
-
-			// look for any active animations, and finish them
-			for ( index = timers.length; index--; ) {
-				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
-					timers[ index ].anim.stop( true );
-					timers.splice( index, 1 );
-				}
-			}
-
-			// look for any animations in the old queue and finish them
-			for ( index = 0; index < length; index++ ) {
-				if ( queue[ index ] && queue[ index ].finish ) {
-					queue[ index ].finish.call( this );
-				}
-			}
-
-			// turn off finishing flag
-			delete data.finish;
-		});
-	}
-});
-
-jQuery.each([ "toggle", "show", "hide" ], function( i, name ) {
-	var cssFn = jQuery.fn[ name ];
-	jQuery.fn[ name ] = function( speed, easing, callback ) {
-		return speed == null || typeof speed === "boolean" ?
-			cssFn.apply( this, arguments ) :
-			this.animate( genFx( name, true ), speed, easing, callback );
-	};
-});
-
-// Generate shortcuts for custom animations
-jQuery.each({
-	slideDown: genFx("show"),
-	slideUp: genFx("hide"),
-	slideToggle: genFx("toggle"),
-	fadeIn: { opacity: "show" },
-	fadeOut: { opacity: "hide" },
-	fadeToggle: { opacity: "toggle" }
-}, function( name, props ) {
-	jQuery.fn[ name ] = function( speed, easing, callback ) {
-		return this.animate( props, speed, easing, callback );
-	};
-});
-
-jQuery.timers = [];
-jQuery.fx.tick = function() {
-	var timer,
-		i = 0,
-		timers = jQuery.timers;
-
-	fxNow = jQuery.now();
-
-	for ( ; i < timers.length; i++ ) {
-		timer = timers[ i ];
-		// Checks the timer has not already been removed
-		if ( !timer() && timers[ i ] === timer ) {
-			timers.splice( i--, 1 );
-		}
-	}
-
-	if ( !timers.length ) {
-		jQuery.fx.stop();
-	}
-	fxNow = undefined;
-};
-
-jQuery.fx.timer = function( timer ) {
-	jQuery.timers.push( timer );
-	if ( timer() ) {
-		jQuery.fx.start();
-	} else {
-		jQuery.timers.pop();
-	}
-};
-
-jQuery.fx.interval = 13;
-
-jQuery.fx.start = function() {
-	if ( !timerId ) {
-		timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
-	}
-};
-
-jQuery.fx.stop = function() {
-	clearInterval( timerId );
-	timerId = null;
-};
-
-jQuery.fx.speeds = {
-	slow: 600,
-	fast: 200,
-	// Default speed
-	_default: 400
-};
-
-
-// Based off of the plugin by Clint Helfers, with permission.
-// http://blindsignals.com/index.php/2009/07/jquery-delay/
-jQuery.fn.delay = function( time, type ) {
-	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
-	type = type || "fx";
-
-	return this.queue( type, function( next, hooks ) {
-		var timeout = setTimeout( next, time );
-		hooks.stop = function() {
-			clearTimeout( timeout );
-		};
-	});
-};
-
-
-(function() {
-	var input = document.createElement( "input" ),
-		select = document.createElement( "select" ),
-		opt = select.appendChild( document.createElement( "option" ) );
-
-	input.type = "checkbox";
-
-	// Support: iOS 5.1, Android 4.x, Android 2.3
-	// Check the default checkbox/radio value ("" on old WebKit; "on" elsewhere)
-	support.checkOn = input.value !== "";
-
-	// Must access the parent to make an option select properly
-	// Support: IE9, IE10
-	support.optSelected = opt.selected;
-
-	// Make sure that the options inside disabled selects aren't marked as disabled
-	// (WebKit marks them as disabled)
-	select.disabled = true;
-	support.optDisabled = !opt.disabled;
-
-	// Check if an input maintains its value after becoming a radio
-	// Support: IE9, IE10
-	input = document.createElement( "input" );
-	input.value = "t";
-	input.type = "radio";
-	support.radioValue = input.value === "t";
-})();
-
-
-var nodeHook, boolHook,
-	attrHandle = jQuery.expr.attrHandle;
-
-jQuery.fn.extend({
-	attr: function( name, value ) {
-		return access( this, jQuery.attr, name, value, arguments.length > 1 );
-	},
-
-	removeAttr: function( name ) {
-		return this.each(function() {
-			jQuery.removeAttr( this, name );
-		});
-	}
-});
-
-jQuery.extend({
-	attr: function( elem, name, value ) {
-		var hooks, ret,
-			nType = elem.nodeType;
-
-		// don't get/set attributes on text, comment and attribute nodes
-		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
-			return;
-		}
-
-		// Fallback to prop when attributes are not supported
-		if ( typeof elem.getAttribute === strundefined ) {
-			return jQuery.prop( elem, name, value );
-		}
-
-		// All attributes are lowercase
-		// Grab necessary hook if one is defined
-		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
-			name = name.toLowerCase();
-			hooks = jQuery.attrHooks[ name ] ||
-				( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
-		}
-
-		if ( value !== undefined ) {
-
-			if ( value === null ) {
-				jQuery.removeAttr( elem, name );
-
-			} else if ( hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ) {
-				return ret;
-
-			} else {
-				elem.setAttribute( name, value + "" );
-				return value;
-			}
-
-		} else if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
-			return ret;
-
-		} else {
-			ret = jQuery.find.attr( elem, name );
-
-			// Non-existent attributes return null, we normalize to undefined
-			return ret == null ?
-				undefined :
-				ret;
-		}
-	},
-
-	removeAttr: function( elem, value ) {
-		var name, propName,
-			i = 0,
-			attrNames = value && value.match( rnotwhite );
-
-		if ( attrNames && elem.nodeType === 1 ) {
-			while ( (name = attrNames[i++]) ) {
-				propName = jQuery.propFix[ name ] || name;
-
-				// Boolean attributes get special treatment (#10870)
-				if ( jQuery.expr.match.bool.test( name ) ) {
-					// Set corresponding property to false
-					elem[ propName ] = false;
-				}
-
-				elem.removeAttribute( name );
-			}
-		}
-	},
-
-	attrHooks: {
-		type: {
-			set: function( elem, value ) {
-				if ( !support.radioValue && value === "radio" &&
-					jQuery.nodeName( elem, "input" ) ) {
-					// Setting the type on a radio button after the value resets the value in IE6-9
-					// Reset value to default in case type is set after value during creation
-					var val = elem.value;
-					elem.setAttribute( "type", value );
-					if ( val ) {
-						elem.value = val;
-					}
-					return value;
-				}
-			}
-		}
-	}
-});
-
-// Hooks for boolean attributes
-boolHook = {
-	set: function( elem, value, name ) {
-		if ( value === false ) {
-			// Remove boolean attributes when set to false
-			jQuery.removeAttr( elem, name );
-		} else {
-			elem.setAttribute( name, name );
-		}
-		return name;
-	}
-};
-jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
-	var getter = attrHandle[ name ] || jQuery.find.attr;
-
-	attrHandle[ name ] = function( elem, name, isXML ) {
-		var ret, handle;
-		if ( !isXML ) {
-			// Avoid an infinite loop by temporarily removing this function from the getter
-			handle = attrHandle[ name ];
-			attrHandle[ name ] = ret;
-			ret = getter( elem, name, isXML ) != null ?
-				name.toLowerCase() :
-				null;
-			attrHandle[ name ] = handle;
-		}
-		return ret;
-	};
-});
-
-
-
-
-var rfocusable = /^(?:input|select|textarea|button)$/i;
-
-jQuery.fn.extend({
-	prop: function( name, value ) {
-		return access( this, jQuery.prop, name, value, arguments.length > 1 );
-	},
-
-	removeProp: function( name ) {
-		return this.each(function() {
-			delete this[ jQuery.propFix[ name ] || name ];
-		});
-	}
-});
-
-jQuery.extend({
-	propFix: {
-		"for": "htmlFor",
-		"class": "className"
-	},
-
-	prop: function( elem, name, value ) {
-		var ret, hooks, notxml,
-			nType = elem.nodeType;
-
-		// don't get/set properties on text, comment and attribute nodes
-		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
-			return;
-		}
-
-		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );
-
-		if ( notxml ) {
-			// Fix name and attach hooks
-			name = jQuery.propFix[ name ] || name;
-			hooks = jQuery.propHooks[ name ];
-		}
-
-		if ( value !== undefined ) {
-			return hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ?
-				ret :
-				( elem[ name ] = value );
-
-		} else {
-			return hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ?
-				ret :
-				elem[ name ];
-		}
-	},
-
-	propHooks: {
-		tabIndex: {
-			get: function( elem ) {
-				return elem.hasAttribute( "tabindex" ) || rfocusable.test( elem.nodeName ) || elem.href ?
-					elem.tabIndex :
-					-1;
-			}
-		}
-	}
-});
-
-// Support: IE9+
-// Selectedness for an option in an optgroup can be inaccurate
-if ( !support.optSelected ) {
-	jQuery.propHooks.selected = {
-		get: function( elem ) {
-			var parent = elem.parentNode;
-			if ( parent && parent.parentNode ) {
-				parent.parentNode.selectedIndex;
-			}
-			return null;
-		}
-	};
-}
-
-jQuery.each([
-	"tabIndex",
-	"readOnly",
-	"maxLength",
-	"cellSpacing",
-	"cellPadding",
-	"rowSpan",
-	"colSpan",
-	"useMap",
-	"frameBorder",
-	"contentEditable"
-], function() {
-	jQuery.propFix[ this.toLowerCase() ] = this;
-});
-
-
-
-
-var rclass = /[\t\r\n\f]/g;
-
-jQuery.fn.extend({
-	addClass: function( value ) {
-		var classes, elem, cur, clazz, j, finalValue,
-			proceed = typeof value === "string" && value,
-			i = 0,
-			len = this.length;
-
-		if ( jQuery.isFunction( value ) ) {
-			return this.each(function( j ) {
-				jQuery( this ).addClass( value.call( this, j, this.className ) );
-			});
-		}
-
-		if ( proceed ) {
-			// The disjunction here is for better compressibility (see removeClass)
-			classes = ( value || "" ).match( rnotwhite ) || [];
-
-			for ( ; i < len; i++ ) {
-				elem = this[ i ];
-				cur = elem.nodeType === 1 && ( elem.className ?
-					( " " + elem.className + " " ).replace( rclass, " " ) :
-					" "
-				);
-
-				if ( cur ) {
-					j = 0;
-					while ( (clazz = classes[j++]) ) {
-						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
-							cur += clazz + " ";
-						}
-					}
-
-					// only assign if different to avoid unneeded rendering.
-					finalValue = jQuery.trim( cur );
-					if ( elem.className !== finalValue ) {
-						elem.className = finalValue;
-					}
-				}
-			}
-		}
-
-		return this;
-	},
-
-	removeClass: function( value ) {
-		var classes, elem, cur, clazz, j, finalValue,
-			proceed = arguments.length === 0 || typeof value === "string" && value,
-			i = 0,
-			len = this.length;
-
-		if ( jQuery.isFunction( value ) ) {
-			return this.each(function( j ) {
-				jQuery( this ).removeClass( value.call( this, j, this.className ) );
-			});
-		}
-		if ( proceed ) {
-			classes = ( value || "" ).match( rnotwhite ) || [];
-
-			for ( ; i < len; i++ ) {
-				elem = this[ i ];
-				// This expression is here for better compressibility (see addClass)
-				cur = elem.nodeType === 1 && ( elem.className ?
-					( " " + elem.className + " " ).replace( rclass, " " ) :
-					""
-				);
-
-				if ( cur ) {
-					j = 0;
-					while ( (clazz = classes[j++]) ) {
-						// Remove *all* instances
-						while ( cur.indexOf( " " + clazz + " " ) >= 0 ) {
-							cur = cur.replace( " " + clazz + " ", " " );
-						}
-					}
-
-					// only assign if different to avoid unneeded rendering.
-					finalValue = value ? jQuery.trim( cur ) : "";
-					if ( elem.className !== finalValue ) {
-						elem.className = finalValue;
-					}
-				}
-			}
-		}
-
-		return this;
-	},
-
-	toggleClass: function( value, stateVal ) {
-		var type = typeof value;
-
-		if ( typeof stateVal === "boolean" && type === "string" ) {
-			return stateVal ? this.addClass( value ) : this.removeClass( value );
-		}
-
-		if ( jQuery.isFunction( value ) ) {
-			return this.each(function( i ) {
-				jQuery( this ).toggleClass( value.call(this, i, this.className, stateVal), stateVal );
-			});
-		}
-
-		return this.each(function() {
-			if ( type === "string" ) {
-				// toggle individual class names
-				var className,
-					i = 0,
-					self = jQuery( this ),
-					classNames = value.match( rnotwhite ) || [];
-
-				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space separated list
-					if ( self.hasClass( className ) ) {
-						self.removeClass( className );
-					} else {
-						self.addClass( className );
-					}
-				}
-
-			// Toggle whole class name
-			} else if ( type === strundefined || type === "boolean" ) {
-				if ( this.className ) {
-					// store className if set
-					data_priv.set( this, "__className__", this.className );
-				}
-
-				// If the element has a class name or if we're passed "false",
-				// then remove the whole classname (if there was one, the above saved it).
-				// Otherwise bring back whatever was previously saved (if anything),
-				// falling back to the empty string if nothing was stored.
-				this.className = this.className || value === false ? "" : data_priv.get( this, "__className__" ) || "";
-			}
-		});
-	},
-
-	hasClass: function( selector ) {
-		var className = " " + selector + " ",
-			i = 0,
-			l = this.length;
-		for ( ; i < l; i++ ) {
-			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) >= 0 ) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-});
-
-
-
-
-var rreturn = /\r/g;
-
-jQuery.fn.extend({
-	val: function( value ) {
-		var hooks, ret, isFunction,
-			elem = this[0];
-
-		if ( !arguments.length ) {
-			if ( elem ) {
-				hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];
-
-				if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
-					return ret;
-				}
-
-				ret = elem.value;
-
-				return typeof ret === "string" ?
-					// handle most common string cases
-					ret.replace(rreturn, "") :
-					// handle cases where value is null/undef or number
-					ret == null ? "" : ret;
-			}
-
-			return;
-		}
-
-		isFunction = jQuery.isFunction( value );
-
-		return this.each(function( i ) {
-			var val;
-
-			if ( this.nodeType !== 1 ) {
-				return;
-			}
-
-			if ( isFunction ) {
-				val = value.call( this, i, jQuery( this ).val() );
-			} else {
-				val = value;
-			}
-
-			// Treat null/undefined as ""; convert numbers to string
-			if ( val == null ) {
-				val = "";
-
-			} else if ( typeof val === "number" ) {
-				val += "";
-
-			} else if ( jQuery.isArray( val ) ) {
-				val = jQuery.map( val, function( value ) {
-					return value == null ? "" : value + "";
-				});
-			}
-
-			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];
-
-			// If set returns undefined, fall back to normal setting
-			if ( !hooks || !("set" in hooks) || hooks.set( this, val, "value" ) === undefined ) {
-				this.value = val;
-			}
-		});
-	}
-});
-
-jQuery.extend({
-	valHooks: {
-		option: {
-			get: function( elem ) {
-				var val = jQuery.find.attr( elem, "value" );
-				return val != null ?
-					val :
-					// Support: IE10-11+
-					// option.text throws exceptions (#14686, #14858)
-					jQuery.trim( jQuery.text( elem ) );
-			}
-		},
-		select: {
-			get: function( elem ) {
-				var value, option,
-					options = elem.options,
-					index = elem.selectedIndex,
-					one = elem.type === "select-one" || index < 0,
-					values = one ? null : [],
-					max = one ? index + 1 : options.length,
-					i = index < 0 ?
-						max :
-						one ? index : 0;
-
-				// Loop through all the selected options
-				for ( ; i < max; i++ ) {
-					option = options[ i ];
-
-					// IE6-9 doesn't update selected after form reset (#2551)
-					if ( ( option.selected || i === index ) &&
-							// Don't return options that are disabled or in a disabled optgroup
-							( support.optDisabled ? !option.disabled : option.getAttribute( "disabled" ) === null ) &&
-							( !option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" ) ) ) {
-
-						// Get the specific value for the option
-						value = jQuery( option ).val();
-
-						// We don't need an array for one selects
-						if ( one ) {
-							return value;
-						}
-
-						// Multi-Selects return an array
-						values.push( value );
-					}
-				}
-
-				return values;
-			},
-
-			set: function( elem, value ) {
-				var optionSet, option,
-					options = elem.options,
-					values = jQuery.makeArray( value ),
-					i = options.length;
-
-				while ( i-- ) {
-					option = options[ i ];
-					if ( (option.selected = jQuery.inArray( option.value, values ) >= 0) ) {
-						optionSet = true;
-					}
-				}
-
-				// force browsers to behave consistently when non-matching value is set
-				if ( !optionSet ) {
-					elem.selectedIndex = -1;
-				}
-				return values;
-			}
-		}
-	}
-});
-
-// Radios and checkboxes getter/setter
-jQuery.each([ "radio", "checkbox" ], function() {
-	jQuery.valHooks[ this ] = {
-		set: function( elem, value ) {
-			if ( jQuery.isArray( value ) ) {
-				return ( elem.checked = jQuery.inArray( jQuery(elem).val(), value ) >= 0 );
-			}
-		}
-	};
-	if ( !support.checkOn ) {
-		jQuery.valHooks[ this ].get = function( elem ) {
-			// Support: Webkit
-			// "" is returned instead of "on" if a value isn't specified
-			return elem.getAttribute("value") === null ? "on" : elem.value;
-		};
-	}
-});
-
-
-
-
-// Return jQuery for attributes-only inclusion
-
-
-jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
-	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
-	"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {
-
-	// Handle event binding
-	jQuery.fn[ name ] = function( data, fn ) {
-		return arguments.length > 0 ?
-			this.on( name, null, data, fn ) :
-			this.trigger( name );
-	};
-});
-
-jQuery.fn.extend({
-	hover: function( fnOver, fnOut ) {
-		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
-	},
-
-	bind: function( types, data, fn ) {
-		return this.on( types, null, data, fn );
-	},
-	unbind: function( types, fn ) {
-		return this.off( types, null, fn );
-	},
-
-	delegate: function( selector, types, data, fn ) {
-		return this.on( types, selector, data, fn );
-	},
-	undelegate: function( selector, types, fn ) {
-		// ( namespace ) or ( selector, types [, fn] )
-		return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
-	}
-});
-
-
-var nonce = jQuery.now();
-
-var rquery = (/\?/);
-
-
-
-// Support: Android 2.3
-// Workaround failure to string-cast null input
-jQuery.parseJSON = function( data ) {
-	return JSON.parse( data + "" );
-};
-
-
-// Cross-browser xml parsing
-jQuery.parseXML = function( data ) {
-	var xml, tmp;
-	if ( !data || typeof data !== "string" ) {
-		return null;
-	}
-
-	// Support: IE9
-	try {
-		tmp = new DOMParser();
-		xml = tmp.parseFromString( data, "text/xml" );
-	} catch ( e ) {
-		xml = undefined;
-	}
-
-	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
-		jQuery.error( "Invalid XML: " + data );
-	}
-	return xml;
-};
-
-
-var
-	// Document location
-	ajaxLocParts,
-	ajaxLocation,
-
-	rhash = /#.*$/,
-	rts = /([?&])_=[^&]*/,
-	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
-	// #7653, #8125, #8152: local protocol detection
-	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
-	rnoContent = /^(?:GET|HEAD)$/,
-	rprotocol = /^\/\//,
-	rurl = /^([\w.+-]+:)(?:\/\/(?:[^\/?#]*@|)([^\/?#:]*)(?::(\d+)|)|)/,
-
-	/* Prefilters
-	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
-	 * 2) These are called:
-	 *    - BEFORE asking for a transport
-	 *    - AFTER param serialization (s.data is a string if s.processData is true)
-	 * 3) key is the dataType
-	 * 4) the catchall symbol "*" can be used
-	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
-	 */
-	prefilters = {},
-
-	/* Transports bindings
-	 * 1) key is the dataType
-	 * 2) the catchall symbol "*" can be used
-	 * 3) selection will start with transport dataType and THEN go to "*" if needed
-	 */
-	transports = {},
-
-	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
-	allTypes = "*/".concat("*");
-
-// #8138, IE may throw an exception when accessing
-// a field from window.location if document.domain has been set
-try {
-	ajaxLocation = location.href;
-} catch( e ) {
-	// Use the href attribute of an A element
-	// since IE will modify it given document.location
-	ajaxLocation = document.createElement( "a" );
-	ajaxLocation.href = "";
-	ajaxLocation = ajaxLocation.href;
-}
-
-// Segment location into parts
-ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];
-
-// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
-function addToPrefiltersOrTransports( structure ) {
-
-	// dataTypeExpression is optional and defaults to "*"
-	return function( dataTypeExpression, func ) {
-
-		if ( typeof dataTypeExpression !== "string" ) {
-			func = dataTypeExpression;
-			dataTypeExpression = "*";
-		}
-
-		var dataType,
-			i = 0,
-			dataTypes = dataTypeExpression.toLowerCase().match( rnotwhite ) || [];
-
-		if ( jQuery.isFunction( func ) ) {
-			// For each dataType in the dataTypeExpression
-			while ( (dataType = dataTypes[i++]) ) {
-				// Prepend if requested
-				if ( dataType[0] === "+" ) {
-					dataType = dataType.slice( 1 ) || "*";
-					(structure[ dataType ] = structure[ dataType ] || []).unshift( func );
-
-				// Otherwise append
-				} else {
-					(structure[ dataType ] = structure[ dataType ] || []).push( func );
-				}
-			}
-		}
-	};
-}
-
-// Base inspection function for prefilters and transports
-function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
-
-	var inspected = {},
-		seekingTransport = ( structure === transports );
-
-	function inspect( dataType ) {
-		var selected;
-		inspected[ dataType ] = true;
-		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
-			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
-			if ( typeof dataTypeOrTransport === "string" && !seekingTransport && !inspected[ dataTypeOrTransport ] ) {
-				options.dataTypes.unshift( dataTypeOrTransport );
-				inspect( dataTypeOrTransport );
-				return false;
-			} else if ( seekingTransport ) {
-				return !( selected = dataTypeOrTransport );
-			}
-		});
-		return selected;
-	}
-
-	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
-}
-
-// A special extend for ajax options
-// that takes "flat" options (not to be deep extended)
-// Fixes #9887
-function ajaxExtend( target, src ) {
-	var key, deep,
-		flatOptions = jQuery.ajaxSettings.flatOptions || {};
-
-	for ( key in src ) {
-		if ( src[ key ] !== undefined ) {
-			( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
-		}
-	}
-	if ( deep ) {
-		jQuery.extend( true, target, deep );
-	}
-
-	return target;
-}
-
-/* Handles responses to an ajax request:
- * - finds the right dataType (mediates between content-type and expected dataType)
- * - returns the corresponding response
- */
-function ajaxHandleResponses( s, jqXHR, responses ) {
-
-	var ct, type, finalDataType, firstDataType,
-		contents = s.contents,
-		dataTypes = s.dataTypes;
-
-	// Remove auto dataType and get content-type in the process
-	while ( dataTypes[ 0 ] === "*" ) {
-		dataTypes.shift();
-		if ( ct === undefined ) {
-			ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
-		}
-	}
-
-	// Check if we're dealing with a known content-type
-	if ( ct ) {
-		for ( type in contents ) {
-			if ( contents[ type ] && contents[ type ].test( ct ) ) {
-				dataTypes.unshift( type );
-				break;
-			}
-		}
-	}
-
-	// Check to see if we have a response for the expected dataType
-	if ( dataTypes[ 0 ] in responses ) {
-		finalDataType = dataTypes[ 0 ];
-	} else {
-		// Try convertible dataTypes
-		for ( type in responses ) {
-			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
-				finalDataType = type;
-				break;
-			}
-			if ( !firstDataType ) {
-				firstDataType = type;
-			}
-		}
-		// Or just use first one
-		finalDataType = finalDataType || firstDataType;
-	}
-
-	// If we found a dataType
-	// We add the dataType to the list if needed
-	// and return the corresponding response
-	if ( finalDataType ) {
-		if ( finalDataType !== dataTypes[ 0 ] ) {
-			dataTypes.unshift( finalDataType );
-		}
-		return responses[ finalDataType ];
-	}
-}
-
-/* Chain conversions given the request and the original response
- * Also sets the responseXXX fields on the jqXHR instance
- */
-function ajaxConvert( s, response, jqXHR, isSuccess ) {
-	var conv2, current, conv, tmp, prev,
-		converters = {},
-		// Work with a copy of dataTypes in case we need to modify it for conversion
-		dataTypes = s.dataTypes.slice();
-
-	// Create converters map with lowercased keys
-	if ( dataTypes[ 1 ] ) {
-		for ( conv in s.converters ) {
-			converters[ conv.toLowerCase() ] = s.converters[ conv ];
-		}
-	}
-
-	current = dataTypes.shift();
-
-	// Convert to each sequential dataType
-	while ( current ) {
-
-		if ( s.responseFields[ current ] ) {
-			jqXHR[ s.responseFields[ current ] ] = response;
-		}
-
-		// Apply the dataFilter if provided
-		if ( !prev && isSuccess && s.dataFilter ) {
-			response = s.dataFilter( response, s.dataType );
-		}
-
-		prev = current;
-		current = dataTypes.shift();
-
-		if ( current ) {
-
-		// There's only work to do if current dataType is non-auto
-			if ( current === "*" ) {
-
-				current = prev;
-
-			// Convert response if prev dataType is non-auto and differs from current
-			} else if ( prev !== "*" && prev !== current ) {
-
-				// Seek a direct converter
-				conv = converters[ prev + " " + current ] || converters[ "* " + current ];
-
-				// If none found, seek a pair
-				if ( !conv ) {
-					for ( conv2 in converters ) {
-
-						// If conv2 outputs current
-						tmp = conv2.split( " " );
-						if ( tmp[ 1 ] === current ) {
-
-							// If prev can be converted to accepted input
-							conv = converters[ prev + " " + tmp[ 0 ] ] ||
-								converters[ "* " + tmp[ 0 ] ];
-							if ( conv ) {
-								// Condense equivalence converters
-								if ( conv === true ) {
-									conv = converters[ conv2 ];
-
-								// Otherwise, insert the intermediate dataType
-								} else if ( converters[ conv2 ] !== true ) {
-									current = tmp[ 0 ];
-									dataTypes.unshift( tmp[ 1 ] );
-								}
-								break;
-							}
-						}
-					}
-				}
-
-				// Apply converter (if not an equivalence)
-				if ( conv !== true ) {
-
-					// Unless errors are allowed to bubble, catch and return them
-					if ( conv && s[ "throws" ] ) {
-						response = conv( response );
-					} else {
-						try {
-							response = conv( response );
-						} catch ( e ) {
-							return { state: "parsererror", error: conv ? e : "No conversion from " + prev + " to " + current };
-						}
-					}
-				}
-			}
-		}
-	}
-
-	return { state: "success", data: response };
-}
-
-jQuery.extend({
-
-	// Counter for holding the number of active queries
-	active: 0,
-
-	// Last-Modified header cache for next request
-	lastModified: {},
-	etag: {},
-
-	ajaxSettings: {
-		url: ajaxLocation,
-		type: "GET",
-		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
-		global: true,
-		processData: true,
-		async: true,
-		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
-		/*
-		timeout: 0,
-		data: null,
-		dataType: null,
-		username: null,
-		password: null,
-		cache: null,
-		throws: false,
-		traditional: false,
-		headers: {},
-		*/
-
-		accepts: {
-			"*": allTypes,
-			text: "text/plain",
-			html: "text/html",
-			xml: "application/xml, text/xml",
-			json: "application/json, text/javascript"
-		},
-
-		contents: {
-			xml: /xml/,
-			html: /html/,
-			json: /json/
-		},
-
-		responseFields: {
-			xml: "responseXML",
-			text: "responseText",
-			json: "responseJSON"
-		},
-
-		// Data converters
-		// Keys separate source (or catchall "*") and destination types with a single space
-		converters: {
-
-			// Convert anything to text
-			"* text": String,
-
-			// Text to html (true = no transformation)
-			"text html": true,
-
-			// Evaluate text as a json expression
-			"text json": jQuery.parseJSON,
-
-			// Parse text as xml
-			"text xml": jQuery.parseXML
-		},
-
-		// For options that shouldn't be deep extended:
-		// you can add your own custom options here if
-		// and when you create one that shouldn't be
-		// deep extended (see ajaxExtend)
-		flatOptions: {
-			url: true,
-			context: true
-		}
-	},
-
-	// Creates a full fledged settings object into target
-	// with both ajaxSettings and settings fields.
-	// If target is omitted, writes into ajaxSettings.
-	ajaxSetup: function( target, settings ) {
-		return settings ?
-
-			// Building a settings object
-			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
-
-			// Extending ajaxSettings
-			ajaxExtend( jQuery.ajaxSettings, target );
-	},
-
-	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
-	ajaxTransport: addToPrefiltersOrTransports( transports ),
-
-	// Main method
-	ajax: function( url, options ) {
-
-		// If url is an object, simulate pre-1.5 signature
-		if ( typeof url === "object" ) {
-			options = url;
-			url = undefined;
-		}
-
-		// Force options to be an object
-		options = options || {};
-
-		var transport,
-			// URL without anti-cache param
-			cacheURL,
-			// Response headers
-			responseHeadersString,
-			responseHeaders,
-			// timeout handle
-			timeoutTimer,
-			// Cross-domain detection vars
-			parts,
-			// To know if global events are to be dispatched
-			fireGlobals,
-			// Loop variable
-			i,
-			// Create the final options object
-			s = jQuery.ajaxSetup( {}, options ),
-			// Callbacks context
-			callbackContext = s.context || s,
-			// Context for global events is callbackContext if it is a DOM node or jQuery collection
-			globalEventContext = s.context && ( callbackContext.nodeType || callbackContext.jquery ) ?
-				jQuery( callbackContext ) :
-				jQuery.event,
-			// Deferreds
-			deferred = jQuery.Deferred(),
-			completeDeferred = jQuery.Callbacks("once memory"),
-			// Status-dependent callbacks
-			statusCode = s.statusCode || {},
-			// Headers (they are sent all at once)
-			requestHeaders = {},
-			requestHeadersNames = {},
-			// The jqXHR state
-			state = 0,
-			// Default abort message
-			strAbort = "canceled",
-			// Fake xhr
-			jqXHR = {
-				readyState: 0,
-
-				// Builds headers hashtable if needed
-				getResponseHeader: function( key ) {
-					var match;
-					if ( state === 2 ) {
-						if ( !responseHeaders ) {
-							responseHeaders = {};
-							while ( (match = rheaders.exec( responseHeadersString )) ) {
-								responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
-							}
-						}
-						match = responseHeaders[ key.toLowerCase() ];
-					}
-					return match == null ? null : match;
-				},
-
-				// Raw string
-				getAllResponseHeaders: function() {
-					return state === 2 ? responseHeadersString : null;
-				},
-
-				// Caches the header
-				setRequestHeader: function( name, value ) {
-					var lname = name.toLowerCase();
-					if ( !state ) {
-						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
-						requestHeaders[ name ] = value;
-					}
-					return this;
-				},
-
-				// Overrides response content-type header
-				overrideMimeType: function( type ) {
-					if ( !state ) {
-						s.mimeType = type;
-					}
-					return this;
-				},
-
-				// Status-dependent callbacks
-				statusCode: function( map ) {
-					var code;
-					if ( map ) {
-						if ( state < 2 ) {
-							for ( code in map ) {
-								// Lazy-add the new callback in a way that preserves old ones
-								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
-							}
-						} else {
-							// Execute the appropriate callbacks
-							jqXHR.always( map[ jqXHR.status ] );
-						}
-					}
-					return this;
-				},
-
-				// Cancel the request
-				abort: function( statusText ) {
-					var finalText = statusText || strAbort;
-					if ( transport ) {
-						transport.abort( finalText );
-					}
-					done( 0, finalText );
-					return this;
-				}
-			};
-
-		// Attach deferreds
-		deferred.promise( jqXHR ).complete = completeDeferred.add;
-		jqXHR.success = jqXHR.done;
-		jqXHR.error = jqXHR.fail;
-
-		// Remove hash character (#7531: and string promotion)
-		// Add protocol if not provided (prefilters might expect it)
-		// Handle falsy url in the settings object (#10093: consistency with old signature)
-		// We also use the url parameter if available
-		s.url = ( ( url || s.url || ajaxLocation ) + "" ).replace( rhash, "" )
-			.replace( rprotocol, ajaxLocParts[ 1 ] + "//" );
-
-		// Alias method option to type as per ticket #12004
-		s.type = options.method || options.type || s.method || s.type;
-
-		// Extract dataTypes list
-		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().match( rnotwhite ) || [ "" ];
-
-		// A cross-domain request is in order when we have a protocol:host:port mismatch
-		if ( s.crossDomain == null ) {
-			parts = rurl.exec( s.url.toLowerCase() );
-			s.crossDomain = !!( parts &&
-				( parts[ 1 ] !== ajaxLocParts[ 1 ] || parts[ 2 ] !== ajaxLocParts[ 2 ] ||
-					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? "80" : "443" ) ) !==
-						( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? "80" : "443" ) ) )
-			);
-		}
-
-		// Convert data if not already a string
-		if ( s.data && s.processData && typeof s.data !== "string" ) {
-			s.data = jQuery.param( s.data, s.traditional );
-		}
-
-		// Apply prefilters
-		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
-
-		// If request was aborted inside a prefilter, stop there
-		if ( state === 2 ) {
-			return jqXHR;
-		}
-
-		// We can fire global events as of now if asked to
-		fireGlobals = s.global;
-
-		// Watch for a new set of requests
-		if ( fireGlobals && jQuery.active++ === 0 ) {
-			jQuery.event.trigger("ajaxStart");
-		}
-
-		// Uppercase the type
-		s.type = s.type.toUpperCase();
-
-		// Determine if request has content
-		s.hasContent = !rnoContent.test( s.type );
-
-		// Save the URL in case we're toying with the If-Modified-Since
-		// and/or If-None-Match header later on
-		cacheURL = s.url;
-
-		// More options handling for requests with no content
-		if ( !s.hasContent ) {
-
-			// If data is available, append data to url
-			if ( s.data ) {
-				cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
-				// #9682: remove data so that it's not used in an eventual retry
-				delete s.data;
-			}
-
-			// Add anti-cache in url if needed
-			if ( s.cache === false ) {
-				s.url = rts.test( cacheURL ) ?
-
-					// If there is already a '_' parameter, set its value
-					cacheURL.replace( rts, "$1_=" + nonce++ ) :
-
-					// Otherwise add one to the end
-					cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
-			}
-		}
-
-		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
-		if ( s.ifModified ) {
-			if ( jQuery.lastModified[ cacheURL ] ) {
-				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
-			}
-			if ( jQuery.etag[ cacheURL ] ) {
-				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
-			}
-		}
-
-		// Set the correct header, if data is being sent
-		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
-			jqXHR.setRequestHeader( "Content-Type", s.contentType );
-		}
-
-		// Set the Accepts header for the server, depending on the dataType
-		jqXHR.setRequestHeader(
-			"Accept",
-			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
-				s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
-				s.accepts[ "*" ]
-		);
-
-		// Check for headers option
-		for ( i in s.headers ) {
-			jqXHR.setRequestHeader( i, s.headers[ i ] );
-		}
-
-		// Allow custom headers/mimetypes and early abort
-		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
-			// Abort if not done already and return
-			return jqXHR.abort();
-		}
-
-		// aborting is no longer a cancellation
-		strAbort = "abort";
-
-		// Install callbacks on deferreds
-		for ( i in { success: 1, error: 1, complete: 1 } ) {
-			jqXHR[ i ]( s[ i ] );
-		}
-
-		// Get transport
-		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
-
-		// If no transport, we auto-abort
-		if ( !transport ) {
-			done( -1, "No Transport" );
-		} else {
-			jqXHR.readyState = 1;
-
-			// Send global event
-			if ( fireGlobals ) {
-				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
-			}
-			// Timeout
-			if ( s.async && s.timeout > 0 ) {
-				timeoutTimer = setTimeout(function() {
-					jqXHR.abort("timeout");
-				}, s.timeout );
-			}
-
-			try {
-				state = 1;
-				transport.send( requestHeaders, done );
-			} catch ( e ) {
-				// Propagate exception as error if not done
-				if ( state < 2 ) {
-					done( -1, e );
-				// Simply rethrow otherwise
-				} else {
-					throw e;
-				}
-			}
-		}
-
-		// Callback for when everything is done
-		function done( status, nativeStatusText, responses, headers ) {
-			var isSuccess, success, error, response, modified,
-				statusText = nativeStatusText;
-
-			// Called once
-			if ( state === 2 ) {
-				return;
-			}
-
-			// State is "done" now
-			state = 2;
-
-			// Clear timeout if it exists
-			if ( timeoutTimer ) {
-				clearTimeout( timeoutTimer );
-			}
-
-			// Dereference transport for early garbage collection
-			// (no matter how long the jqXHR object will be used)
-			transport = undefined;
-
-			// Cache response headers
-			responseHeadersString = headers || "";
-
-			// Set readyState
-			jqXHR.readyState = status > 0 ? 4 : 0;
-
-			// Determine if successful
-			isSuccess = status >= 200 && status < 300 || status === 304;
-
-			// Get response data
-			if ( responses ) {
-				response = ajaxHandleResponses( s, jqXHR, responses );
-			}
-
-			// Convert no matter what (that way responseXXX fields are always set)
-			response = ajaxConvert( s, response, jqXHR, isSuccess );
-
-			// If successful, handle type chaining
-			if ( isSuccess ) {
-
-				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
-				if ( s.ifModified ) {
-					modified = jqXHR.getResponseHeader("Last-Modified");
-					if ( modified ) {
-						jQuery.lastModified[ cacheURL ] = modified;
-					}
-					modified = jqXHR.getResponseHeader("etag");
-					if ( modified ) {
-						jQuery.etag[ cacheURL ] = modified;
-					}
-				}
-
-				// if no content
-				if ( status === 204 || s.type === "HEAD" ) {
-					statusText = "nocontent";
-
-				// if not modified
-				} else if ( status === 304 ) {
-					statusText = "notmodified";
-
-				// If we have data, let's convert it
-				} else {
-					statusText = response.state;
-					success = response.data;
-					error = response.error;
-					isSuccess = !error;
-				}
-			} else {
-				// We extract error from statusText
-				// then normalize statusText and status for non-aborts
-				error = statusText;
-				if ( status || !statusText ) {
-					statusText = "error";
-					if ( status < 0 ) {
-						status = 0;
-					}
-				}
-			}
-
-			// Set data for the fake xhr object
-			jqXHR.status = status;
-			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
-
-			// Success/Error
-			if ( isSuccess ) {
-				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
-			} else {
-				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
-			}
-
-			// Status-dependent callbacks
-			jqXHR.statusCode( statusCode );
-			statusCode = undefined;
-
-			if ( fireGlobals ) {
-				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
-					[ jqXHR, s, isSuccess ? success : error ] );
-			}
-
-			// Complete
-			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
-
-			if ( fireGlobals ) {
-				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
-				// Handle the global AJAX counter
-				if ( !( --jQuery.active ) ) {
-					jQuery.event.trigger("ajaxStop");
-				}
-			}
-		}
-
-		return jqXHR;
-	},
-
-	getJSON: function( url, data, callback ) {
-		return jQuery.get( url, data, callback, "json" );
-	},
-
-	getScript: function( url, callback ) {
-		return jQuery.get( url, undefined, callback, "script" );
-	}
-});
-
-jQuery.each( [ "get", "post" ], function( i, method ) {
-	jQuery[ method ] = function( url, data, callback, type ) {
-		// shift arguments if data argument was omitted
-		if ( jQuery.isFunction( data ) ) {
-			type = type || callback;
-			callback = data;
-			data = undefined;
-		}
-
-		return jQuery.ajax({
-			url: url,
-			type: method,
-			dataType: type,
-			data: data,
-			success: callback
-		});
-	};
-});
-
-// Attach a bunch of functions for handling common AJAX events
-jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSuccess", "ajaxSend" ], function( i, type ) {
-	jQuery.fn[ type ] = function( fn ) {
-		return this.on( type, fn );
-	};
-});
-
-
-jQuery._evalUrl = function( url ) {
-	return jQuery.ajax({
-		url: url,
-		type: "GET",
-		dataType: "script",
-		async: false,
-		global: false,
-		"throws": true
-	});
-};
-
-
-jQuery.fn.extend({
-	wrapAll: function( html ) {
-		var wrap;
-
-		if ( jQuery.isFunction( html ) ) {
-			return this.each(function( i ) {
-				jQuery( this ).wrapAll( html.call(this, i) );
-			});
-		}
-
-		if ( this[ 0 ] ) {
-
-			// The elements to wrap the target around
-			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );
-
-			if ( this[ 0 ].parentNode ) {
-				wrap.insertBefore( this[ 0 ] );
-			}
-
-			wrap.map(function() {
-				var elem = this;
-
-				while ( elem.firstElementChild ) {
-					elem = elem.firstElementChild;
-				}
-
-				return elem;
-			}).append( this );
-		}
-
-		return this;
-	},
-
-	wrapInner: function( html ) {
-		if ( jQuery.isFunction( html ) ) {
-			return this.each(function( i ) {
-				jQuery( this ).wrapInner( html.call(this, i) );
-			});
-		}
-
-		return this.each(function() {
-			var self = jQuery( this ),
-				contents = self.contents();
-
-			if ( contents.length ) {
-				contents.wrapAll( html );
-
-			} else {
-				self.append( html );
-			}
-		});
-	},
-
-	wrap: function( html ) {
-		var isFunction = jQuery.isFunction( html );
-
-		return this.each(function( i ) {
-			jQuery( this ).wrapAll( isFunction ? html.call(this, i) : html );
-		});
-	},
-
-	unwrap: function() {
-		return this.parent().each(function() {
-			if ( !jQuery.nodeName( this, "body" ) ) {
-				jQuery( this ).replaceWith( this.childNodes );
-			}
-		}).end();
-	}
-});
-
-
-var r20 = /%20/g,
-	rbracket = /\[\]$/,
-	rCRLF = /\r?\n/g,
-	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
-	rsubmittable = /^(?:input|select|textarea|keygen)/i;
-
-function buildParams( prefix, obj, traditional, add ) {
-	var name;
-
-	if ( jQuery.isArray( obj ) ) {
-		// Serialize array item.
-		jQuery.each( obj, function( i, v ) {
-			if ( traditional || rbracket.test( prefix ) ) {
-				// Treat each array item as a scalar.
-				add( prefix, v );
-
-			} else {
-				// Item is non-scalar (array or object), encode its numeric index.
-				buildParams( prefix + "[" + ( typeof v === "object" ? i : "" ) + "]", v, traditional, add );
-			}
-		});
-
-	} else if ( !traditional && jQuery.type( obj ) === "object" ) {
-		// Serialize object item.
-		for ( name in obj ) {
-			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
-		}
-
-	} else {
-		// Serialize scalar item.
-		add( prefix, obj );
-	}
-}
-
-// Serialize an array of form elements or a set of
-// key/values into a query string
-jQuery.param = function( a, traditional ) {
-	var prefix,
-		s = [],
-		add = function( key, value ) {
-			// If value is a function, invoke it and return its value
-			value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );
-			s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
-		};
-
-	// Set traditional to true for jQuery <= 1.3.2 behavior.
-	if ( traditional === undefined ) {
-		traditional = jQuery.ajaxSettings && jQuery.ajaxSettings.traditional;
-	}
-
-	// If an array was passed in, assume that it is an array of form elements.
-	if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
-		// Serialize the form elements
-		jQuery.each( a, function() {
-			add( this.name, this.value );
-		});
-
-	} else {
-		// If traditional, encode the "old" way (the way 1.3.2 or older
-		// did it), otherwise encode params recursively.
-		for ( prefix in a ) {
-			buildParams( prefix, a[ prefix ], traditional, add );
-		}
-	}
-
-	// Return the resulting serialization
-	return s.join( "&" ).replace( r20, "+" );
-};
-
-jQuery.fn.extend({
-	serialize: function() {
-		return jQuery.param( this.serializeArray() );
-	},
-	serializeArray: function() {
-		return this.map(function() {
-			// Can add propHook for "elements" to filter or add form elements
-			var elements = jQuery.prop( this, "elements" );
-			return elements ? jQuery.makeArray( elements ) : this;
-		})
-		.filter(function() {
-			var type = this.type;
-
-			// Use .is( ":disabled" ) so that fieldset[disabled] works
-			return this.name && !jQuery( this ).is( ":disabled" ) &&
-				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
-				( this.checked || !rcheckableType.test( type ) );
-		})
-		.map(function( i, elem ) {
-			var val = jQuery( this ).val();
-
-			return val == null ?
-				null :
-				jQuery.isArray( val ) ?
-					jQuery.map( val, function( val ) {
-						return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
-					}) :
-					{ name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
-		}).get();
-	}
-});
-
-
-jQuery.ajaxSettings.xhr = function() {
-	try {
-		return new XMLHttpRequest();
-	} catch( e ) {}
-};
-
-var xhrId = 0,
-	xhrCallbacks = {},
-	xhrSuccessStatus = {
-		// file protocol always yields status code 0, assume 200
-		0: 200,
-		// Support: IE9
-		// #1450: sometimes IE returns 1223 when it should be 204
-		1223: 204
-	},
-	xhrSupported = jQuery.ajaxSettings.xhr();
-
-// Support: IE9
-// Open requests must be manually aborted on unload (#5280)
-if ( window.ActiveXObject ) {
-	jQuery( window ).on( "unload", function() {
-		for ( var key in xhrCallbacks ) {
-			xhrCallbacks[ key ]();
-		}
-	});
-}
-
-support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
-support.ajax = xhrSupported = !!xhrSupported;
-
-jQuery.ajaxTransport(function( options ) {
-	var callback;
-
-	// Cross domain only allowed if supported through XMLHttpRequest
-	if ( support.cors || xhrSupported && !options.crossDomain ) {
-		return {
-			send: function( headers, complete ) {
-				var i,
-					xhr = options.xhr(),
-					id = ++xhrId;
-
-				xhr.open( options.type, options.url, options.async, options.username, options.password );
-
-				// Apply custom fields if provided
-				if ( options.xhrFields ) {
-					for ( i in options.xhrFields ) {
-						xhr[ i ] = options.xhrFields[ i ];
-					}
-				}
-
-				// Override mime type if needed
-				if ( options.mimeType && xhr.overrideMimeType ) {
-					xhr.overrideMimeType( options.mimeType );
-				}
-
-				// X-Requested-With header
-				// For cross-domain requests, seeing as conditions for a preflight are
-				// akin to a jigsaw puzzle, we simply never set it to be sure.
-				// (it can always be set on a per-request basis or even using ajaxSetup)
-				// For same-domain requests, won't change header if already provided.
-				if ( !options.crossDomain && !headers["X-Requested-With"] ) {
-					headers["X-Requested-With"] = "XMLHttpRequest";
-				}
-
-				// Set headers
-				for ( i in headers ) {
-					xhr.setRequestHeader( i, headers[ i ] );
-				}
-
-				// Callback
-				callback = function( type ) {
-					return function() {
-						if ( callback ) {
-							delete xhrCallbacks[ id ];
-							callback = xhr.onload = xhr.onerror = null;
-
-							if ( type === "abort" ) {
-								xhr.abort();
-							} else if ( type === "error" ) {
-								complete(
-									// file: protocol always yields status 0; see #8605, #14207
-									xhr.status,
-									xhr.statusText
-								);
-							} else {
-								complete(
-									xhrSuccessStatus[ xhr.status ] || xhr.status,
-									xhr.statusText,
-									// Support: IE9
-									// Accessing binary-data responseText throws an exception
-									// (#11426)
-									typeof xhr.responseText === "string" ? {
-										text: xhr.responseText
-									} : undefined,
-									xhr.getAllResponseHeaders()
-								);
-							}
-						}
-					};
-				};
-
-				// Listen to events
-				xhr.onload = callback();
-				xhr.onerror = callback("error");
-
-				// Create the abort callback
-				callback = xhrCallbacks[ id ] = callback("abort");
-
-				try {
-					// Do send the request (this may raise an exception)
-					xhr.send( options.hasContent && options.data || null );
-				} catch ( e ) {
-					// #14683: Only rethrow if this hasn't been notified as an error yet
-					if ( callback ) {
-						throw e;
-					}
-				}
-			},
-
-			abort: function() {
-				if ( callback ) {
-					callback();
-				}
-			}
-		};
-	}
-});
-
-
-
-
-// Install script dataType
-jQuery.ajaxSetup({
-	accepts: {
-		script: "text/javascript, application/javascript, application/ecmascript, application/x-ecmascript"
-	},
-	contents: {
-		script: /(?:java|ecma)script/
-	},
-	converters: {
-		"text script": function( text ) {
-			jQuery.globalEval( text );
-			return text;
-		}
-	}
-});
-
-// Handle cache's special case and crossDomain
-jQuery.ajaxPrefilter( "script", function( s ) {
-	if ( s.cache === undefined ) {
-		s.cache = false;
-	}
-	if ( s.crossDomain ) {
-		s.type = "GET";
-	}
-});
-
-// Bind script tag hack transport
-jQuery.ajaxTransport( "script", function( s ) {
-	// This transport only deals with cross domain requests
-	if ( s.crossDomain ) {
-		var script, callback;
-		return {
-			send: function( _, complete ) {
-				script = jQuery("<script>").prop({
-					async: true,
-					charset: s.scriptCharset,
-					src: s.url
-				}).on(
-					"load error",
-					callback = function( evt ) {
-						script.remove();
-						callback = null;
-						if ( evt ) {
-							complete( evt.type === "error" ? 404 : 200, evt.type );
-						}
-					}
-				);
-				document.head.appendChild( script[ 0 ] );
-			},
-			abort: function() {
-				if ( callback ) {
-					callback();
-				}
-			}
-		};
-	}
-});
-
-
-
-
-var oldCallbacks = [],
-	rjsonp = /(=)\?(?=&|$)|\?\?/;
-
-// Default jsonp settings
-jQuery.ajaxSetup({
-	jsonp: "callback",
-	jsonpCallback: function() {
-		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
-		this[ callback ] = true;
-		return callback;
-	}
-});
-
-// Detect, normalize options and install callbacks for jsonp requests
-jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
-
-	var callbackName, overwritten, responseContainer,
-		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
-			"url" :
-			typeof s.data === "string" && !( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") && rjsonp.test( s.data ) && "data"
-		);
-
-	// Handle iff the expected data type is "jsonp" or we have a parameter to set
-	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
-
-		// Get callback name, remembering preexisting value associated with it
-		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
-			s.jsonpCallback() :
-			s.jsonpCallback;
-
-		// Insert callback into url or form data
-		if ( jsonProp ) {
-			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
-		} else if ( s.jsonp !== false ) {
-			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
-		}
-
-		// Use data converter to retrieve json after script execution
-		s.converters["script json"] = function() {
-			if ( !responseContainer ) {
-				jQuery.error( callbackName + " was not called" );
-			}
-			return responseContainer[ 0 ];
-		};
-
-		// force json dataType
-		s.dataTypes[ 0 ] = "json";
-
-		// Install callback
-		overwritten = window[ callbackName ];
-		window[ callbackName ] = function() {
-			responseContainer = arguments;
-		};
-
-		// Clean-up function (fires after converters)
-		jqXHR.always(function() {
-			// Restore preexisting value
-			window[ callbackName ] = overwritten;
-
-			// Save back as free
-			if ( s[ callbackName ] ) {
-				// make sure that re-using the options doesn't screw things around
-				s.jsonpCallback = originalSettings.jsonpCallback;
-
-				// save the callback name for future use
-				oldCallbacks.push( callbackName );
-			}
-
-			// Call if it was a function and we have a response
-			if ( responseContainer && jQuery.isFunction( overwritten ) ) {
-				overwritten( responseContainer[ 0 ] );
-			}
-
-			responseContainer = overwritten = undefined;
-		});
-
-		// Delegate to script
-		return "script";
-	}
-});
-
-
-
-
-// data: string of html
-// context (optional): If specified, the fragment will be created in this context, defaults to document
-// keepScripts (optional): If true, will include scripts passed in the html string
-jQuery.parseHTML = function( data, context, keepScripts ) {
-	if ( !data || typeof data !== "string" ) {
-		return null;
-	}
-	if ( typeof context === "boolean" ) {
-		keepScripts = context;
-		context = false;
-	}
-	context = context || document;
-
-	var parsed = rsingleTag.exec( data ),
-		scripts = !keepScripts && [];
-
-	// Single tag
-	if ( parsed ) {
-		return [ context.createElement( parsed[1] ) ];
-	}
-
-	parsed = jQuery.buildFragment( [ data ], context, scripts );
-
-	if ( scripts && scripts.length ) {
-		jQuery( scripts ).remove();
-	}
-
-	return jQuery.merge( [], parsed.childNodes );
-};
-
-
-// Keep a copy of the old load method
-var _load = jQuery.fn.load;
-
-/**
- * Load a url into a page
- */
-jQuery.fn.load = function( url, params, callback ) {
-	if ( typeof url !== "string" && _load ) {
-		return _load.apply( this, arguments );
-	}
-
-	var selector, type, response,
-		self = this,
-		off = url.indexOf(" ");
-
-	if ( off >= 0 ) {
-		selector = jQuery.trim( url.slice( off ) );
-		url = url.slice( 0, off );
-	}
-
-	// If it's a function
-	if ( jQuery.isFunction( params ) ) {
-
-		// We assume that it's the callback
-		callback = params;
-		params = undefined;
-
-	// Otherwise, build a param string
-	} else if ( params && typeof params === "object" ) {
-		type = "POST";
-	}
-
-	// If we have elements to modify, make the request
-	if ( self.length > 0 ) {
-		jQuery.ajax({
-			url: url,
-
-			// if "type" variable is undefined, then "GET" method will be used
-			type: type,
-			dataType: "html",
-			data: params
-		}).done(function( responseText ) {
-
-			// Save response for use in complete callback
-			response = arguments;
-
-			self.html( selector ?
-
-				// If a selector was specified, locate the right elements in a dummy div
-				// Exclude scripts to avoid IE 'Permission Denied' errors
-				jQuery("<div>").append( jQuery.parseHTML( responseText ) ).find( selector ) :
-
-				// Otherwise use the full result
-				responseText );
-
-		}).complete( callback && function( jqXHR, status ) {
-			self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
-		});
-	}
-
-	return this;
-};
-
-
-
-
-var docElem = window.document.documentElement;
-
-/**
- * Gets a window from an element
- */
-function getWindow( elem ) {
-	return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;
-}
-
-jQuery.offset = {
-	setOffset: function( elem, options, i ) {
-		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
-			position = jQuery.css( elem, "position" ),
-			curElem = jQuery( elem ),
-			props = {};
-
-		// Set position first, in-case top/left are set even on static elem
-		if ( position === "static" ) {
-			elem.style.position = "relative";
-		}
-
-		curOffset = curElem.offset();
-		curCSSTop = jQuery.css( elem, "top" );
-		curCSSLeft = jQuery.css( elem, "left" );
-		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
-			( curCSSTop + curCSSLeft ).indexOf("auto") > -1;
-
-		// Need to be able to calculate position if either top or left is auto and position is either absolute or fixed
-		if ( calculatePosition ) {
-			curPosition = curElem.position();
-			curTop = curPosition.top;
-			curLeft = curPosition.left;
-
-		} else {
-			curTop = parseFloat( curCSSTop ) || 0;
-			curLeft = parseFloat( curCSSLeft ) || 0;
-		}
-
-		if ( jQuery.isFunction( options ) ) {
-			options = options.call( elem, i, curOffset );
-		}
-
-		if ( options.top != null ) {
-			props.top = ( options.top - curOffset.top ) + curTop;
-		}
-		if ( options.left != null ) {
-			props.left = ( options.left - curOffset.left ) + curLeft;
-		}
-
-		if ( "using" in options ) {
-			options.using.call( elem, props );
-
-		} else {
-			curElem.css( props );
-		}
-	}
-};
-
-jQuery.fn.extend({
-	offset: function( options ) {
-		if ( arguments.length ) {
-			return options === undefined ?
-				this :
-				this.each(function( i ) {
-					jQuery.offset.setOffset( this, options, i );
-				});
-		}
-
-		var docElem, win,
-			elem = this[ 0 ],
-			box = { top: 0, left: 0 },
-			doc = elem && elem.ownerDocument;
-
-		if ( !doc ) {
-			return;
-		}
-
-		docElem = doc.documentElement;
-
-		// Make sure it's not a disconnected DOM node
-		if ( !jQuery.contains( docElem, elem ) ) {
-			return box;
-		}
-
-		// If we don't have gBCR, just use 0,0 rather than error
-		// BlackBerry 5, iOS 3 (original iPhone)
-		if ( typeof elem.getBoundingClientRect !== strundefined ) {
-			box = elem.getBoundingClientRect();
-		}
-		win = getWindow( doc );
-		return {
-			top: box.top + win.pageYOffset - docElem.clientTop,
-			left: box.left + win.pageXOffset - docElem.clientLeft
-		};
-	},
-
-	position: function() {
-		if ( !this[ 0 ] ) {
-			return;
-		}
-
-		var offsetParent, offset,
-			elem = this[ 0 ],
-			parentOffset = { top: 0, left: 0 };
-
-		// Fixed elements are offset from window (parentOffset = {top:0, left: 0}, because it is its only offset parent
-		if ( jQuery.css( elem, "position" ) === "fixed" ) {
-			// We assume that getBoundingClientRect is available when computed position is fixed
-			offset = elem.getBoundingClientRect();
-
-		} else {
-			// Get *real* offsetParent
-			offsetParent = this.offsetParent();
-
-			// Get correct offsets
-			offset = this.offset();
-			if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
-				parentOffset = offsetParent.offset();
-			}
-
-			// Add offsetParent borders
-			parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
-			parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
-		}
-
-		// Subtract parent offsets and element margins
-		return {
-			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
-			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
-		};
-	},
-
-	offsetParent: function() {
-		return this.map(function() {
-			var offsetParent = this.offsetParent || docElem;
-
-			while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) && jQuery.css( offsetParent, "position" ) === "static" ) ) {
-				offsetParent = offsetParent.offsetParent;
-			}
-
-			return offsetParent || docElem;
-		});
-	}
-});
-
-// Create scrollLeft and scrollTop methods
-jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
-	var top = "pageYOffset" === prop;
-
-	jQuery.fn[ method ] = function( val ) {
-		return access( this, function( elem, method, val ) {
-			var win = getWindow( elem );
-
-			if ( val === undefined ) {
-				return win ? win[ prop ] : elem[ method ];
-			}
-
-			if ( win ) {
-				win.scrollTo(
-					!top ? val : window.pageXOffset,
-					top ? val : window.pageYOffset
-				);
-
-			} else {
-				elem[ method ] = val;
-			}
-		}, method, val, arguments.length, null );
-	};
-});
-
-// Add the top/left cssHooks using jQuery.fn.position
-// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
-// getComputedStyle returns percent when specified for top/left/bottom/right
-// rather than make the css module depend on the offset module, we just check for it here
-jQuery.each( [ "top", "left" ], function( i, prop ) {
-	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
-		function( elem, computed ) {
-			if ( computed ) {
-				computed = curCSS( elem, prop );
-				// if curCSS returns percentage, fallback to offset
-				return rnumnonpx.test( computed ) ?
-					jQuery( elem ).position()[ prop ] + "px" :
-					computed;
-			}
-		}
-	);
-});
-
-
-// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
-jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
-	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name }, function( defaultExtra, funcName ) {
-		// margin is only for outerHeight, outerWidth
-		jQuery.fn[ funcName ] = function( margin, value ) {
-			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
-				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
-
-			return access( this, function( elem, type, value ) {
-				var doc;
-
-				if ( jQuery.isWindow( elem ) ) {
-					// As of 5/8/2012 this will yield incorrect results for Mobile Safari, but there
-					// isn't a whole lot we can do. See pull request at this URL for discussion:
-					// https://github.com/jquery/jquery/pull/764
-					return elem.document.documentElement[ "client" + name ];
-				}
-
-				// Get document width or height
-				if ( elem.nodeType === 9 ) {
-					doc = elem.documentElement;
-
-					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
-					// whichever is greatest
-					return Math.max(
-						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
-						elem.body[ "offset" + name ], doc[ "offset" + name ],
-						doc[ "client" + name ]
-					);
-				}
-
-				return value === undefined ?
-					// Get width or height on the element, requesting but not forcing parseFloat
-					jQuery.css( elem, type, extra ) :
-
-					// Set width or height on the element
-					jQuery.style( elem, type, value, extra );
-			}, type, chainable ? margin : undefined, chainable, null );
-		};
-	});
-});
-
-
-// Register as a named AMD module, since jQuery can be concatenated with other
-// files that may use define, but not via a proper concatenation script that
-// understands anonymous AMD modules. A named AMD is safest and most robust
-// way to register. Lowercase jquery is used because AMD module names are
-// derived from file names, and jQuery is normally delivered in a lowercase
-// file name. Do this after creating the global so that if an AMD module wants
-// to call noConflict to hide this version of jQuery, it will work.
-
-// Note that for maximum portability, libraries that are not jQuery should
-// declare themselves as anonymous modules, and avoid setting a global if an
-// AMD loader is present. jQuery is a special case. For more information, see
-// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
-
-if ( typeof define === "function" && define.amd ) {
-	define( "jquery", [], function() {
-		return jQuery;
-	});
-}
-
-
-
-
-var
-	// Map over jQuery in case of overwrite
-	_jQuery = window.jQuery,
-
-	// Map over the $ in case of overwrite
-	_$ = window.$;
-
-jQuery.noConflict = function( deep ) {
-	if ( window.$ === jQuery ) {
-		window.$ = _$;
-	}
-
-	if ( deep && window.jQuery === jQuery ) {
-		window.jQuery = _jQuery;
-	}
-
-	return jQuery;
-};
-
-// Expose jQuery and $ identifiers, even in
-// AMD (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
-// and CommonJS for browser emulators (#13566)
-if ( typeof noGlobal === strundefined ) {
-	window.jQuery = window.$ = jQuery;
-}
-
-
-
-
-return jQuery;
-
-}));
diff --git a/www/js/jquery.sparkline.js b/www/js/jquery.sparkline.js
deleted file mode 100644
index 0758e0d..0000000
--- a/www/js/jquery.sparkline.js
+++ /dev/null
@@ -1,1463 +0,0 @@
-/**
-*
-* jquery.sparkline.js
-*
-* v2.1.2
-* (c) Splunk, Inc
-* Contact: Gareth Watts (gareth@splunk.com)
-* http://omnipotent.net/jquery.sparkline/
-*
-* Generates inline sparkline charts from data supplied either to the method
-* or inline in HTML
-*
-* Compatible with Internet Explorer 6.0+ and modern browsers equipped with the canvas tag
-* (Firefox 2.0+, Safari, Opera, etc)
-*
-* License: New BSD License
-*
-* Copyright (c) 2012, Splunk Inc.
-* All rights reserved.
-*
-* Redistribution and use in source and binary forms, with or without modification,
-* are permitted provided that the following conditions are met:
-*
-*     * Redistributions of source code must retain the above copyright notice,
-*       this list of conditions and the following disclaimer.
-*     * Redistributions in binary form must reproduce the above copyright notice,
-*       this list of conditions and the following disclaimer in the documentation
-*       and/or other materials provided with the distribution.
-*     * Neither the name of Splunk Inc nor the names of its contributors may
-*       be used to endorse or promote products derived from this software without
-*       specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
-* SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
-* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*
-*
-* Usage:
-*  $(selector).sparkline(values, options)
-*
-* If values is undefined or set to 'html' then the data values are read from the specified tag:
-*   <p>Sparkline: <span class="sparkline">1,4,6,6,8,5,3,5</span></p>
-*   $('.sparkline').sparkline();
-* There must be no spaces in the enclosed data set
-*
-* Otherwise values must be an array of numbers or null values
-*    <p>Sparkline: <span id="sparkline1">This text replaced if the browser is compatible</span></p>
-*    $('#sparkline1').sparkline([1,4,6,6,8,5,3,5])
-*    $('#sparkline2').sparkline([1,4,6,null,null,5,3,5])
-*
-* Values can also be specified in an HTML comment, or as a values attribute:
-*    <p>Sparkline: <span class="sparkline"><!--1,4,6,6,8,5,3,5 --></span></p>
-*    <p>Sparkline: <span class="sparkline" values="1,4,6,6,8,5,3,5"></span></p>
-*    $('.sparkline').sparkline();
-*
-* By default, options should be passed in as teh second argument to the sparkline function:
-*   $('.sparkline').sparkline([1,2,3,4], {type: 'bar'})
-*
-* Supported options:
-*   lineColor - Color of the line used for the chart
-*   fillColor - Color used to fill in the chart - Set to '' or false for a transparent chart
-*   width - Width of the chart - Defaults to 3 times the number of values in pixels
-*   height - Height of the chart - Defaults to the height of the containing element
-*   chartRangeMin - Specify the minimum value to use for the Y range of the chart - Defaults to the minimum value supplied
-*   chartRangeMax - Specify the maximum value to use for the Y range of the chart - Defaults to the maximum value supplied
-*   chartRangeClip - Clip out of range values to the max/min specified by chartRangeMin and chartRangeMax
-*   chartRangeMinX - Specify the minimum value to use for the X range of the chart - Defaults to the minimum value supplied
-*   chartRangeMaxX - Specify the maximum value to use for the X range of the chart - Defaults to the maximum value supplied
-*   tagValuesAttribute - Name of tag attribute to check for data values - Defaults to 'values'
-*   disableInteraction - If set to true then all mouseover/click interaction behaviour will be disabled,
-*       making the plugin perform much like it did in 1.x
-*   disableTooltips - If set to true then tooltips will be disabled - Defaults to false (tooltips enabled)
-*   disableHighlight - If set to true then highlighting of selected chart elements on mouseover will be disabled
-*       defaults to false (highlights enabled)
-*   highlightLighten - Factor to lighten/darken highlighted chart values by - Defaults to 1.4 for a 40% increase
-*   tooltipContainer - Specify which DOM element the tooltip should be rendered into - defaults to document.body
-*   tooltipClassname - Optional CSS classname to apply to tooltips - If not specified then a default style will be applied
-*   tooltipOffsetX - How many pixels away from the mouse pointer to render the tooltip on the X axis
-*   tooltipOffsetY - How many pixels away from the mouse pointer to render the tooltip on the r axis
-*   tooltipFormatter  - Optional callback that allows you to override the HTML displayed in the tooltip
-*       callback is given arguments of (sparkline, options, fields)
-*   tooltipChartTitle - If specified then the tooltip uses the string specified by this setting as a title
-*   tooltipPrefix - A string to prepend to each field displayed in a tooltip
-*   tooltipSuffix - A string to append to each field displayed in a tooltip
-*   tooltipSkipNull - If true then null values will not have a tooltip displayed (defaults to true)
-*   tooltipValueLookups - An object or range map to map field values to tooltip strings
-*       (eg. to map -1 to "Lost", 0 to "Draw", and 1 to "Win")
-*   numberFormatter - Optional callback for formatting numbers in tooltips
-*   numberDigitGroupSep - Character to use for group separator in numbers "1,234" - Defaults to ","
-*   numberDecimalMark - Character to use for the decimal point when formatting numbers - Defaults to "."
-*   numberDigitGroupCount - Number of digits between group separator - Defaults to 3
-*
-* There is 1 type of sparkline, selected by supplying a "type" option of 'bar' (default),
-*
-*   bar - Bar chart.  Options:
-*       barColor - Color of bars for postive values
-*       negBarColor - Color of bars for negative values
-*       zeroColor - Color of bars with zero values
-*       nullColor - Color of bars with null values - Defaults to omitting the bar entirely
-*       barWidth - Width of bars in pixels
-*       barSpacing - Gap between bars in pixels
-*       zeroAxis - Centers the y-axis around zero if true
-*
-*
-*
-*
-*
-*
-*   Examples:
-*   $('#sparkline1').sparkline(myvalues, { lineColor: '#f00', fillColor: false });
-*   $('.barsparks').sparkline('html', { type:'bar', height:'40px', barWidth:5 });
-*/
-
-/*jslint regexp: true, browser: true, jquery: true, white: true, nomen: false, plusplus: false, maxerr: 500, indent: 4 */
-
-(function(document, Math, undefined) { // performance/minified-size optimization
-(function(factory) {
-    if(typeof define === 'function' && define.amd) {
-        define(['jquery'], factory);
-    } else if (jQuery && !jQuery.fn.sparkline) {
-        factory(jQuery);
-    }
-}
-(function($) {
-    'use strict';
-
-    var UNSET_OPTION = {},
-        getDefaults, createClass, clipval, quartile, normalizeValue, normalizeValues,
-        remove, isNumber, all, sum, addCSS, ensureArray, formatNumber,
-        MouseHandler, Tooltip, barHighlightMixin,
-        bar, defaultStyles, initStyles,
-        VShape, VCanvas_base, VCanvas_canvas, pending, shapeCount = 0;
-
-    /**
-     * Default configuration settings
-     */
-    getDefaults = function () {
-        return {
-            // Settings common to most/all chart types
-            common: {
-                type: 'bar',
-                lineColor: '#00f',
-                fillColor: '#cdf',
-                defaultPixelsPerValue: 3,
-                width: 'auto',
-                height: 'auto',
-                tagValuesAttribute: 'values',
-                enableHighlight: true,
-                highlightLighten: 1.4,
-                tooltipSkipNull: true,
-                tooltipPrefix: '',
-                tooltipSuffix: '',
-                numberFormatter: false,
-                numberDigitGroupCount: 3,
-                numberDigitGroupSep: ',',
-                numberDecimalMark: '.',
-                disableTooltips: false,
-                disableInteraction: false
-            },
-            // Defaults for bar charts
-            bar: {
-                barColor: '#3366cc',
-                negBarColor: '#f44',
-                zeroColor: undefined,
-                nullColor: undefined,
-                zeroAxis: true,
-                barWidth: 4,
-                barSpacing: 1,
-                chartRangeMax: undefined,
-                chartRangeMin: undefined,
-                chartRangeClip: false,
-                tooltipFormat: '',
-            },
-        };
-    };
-
-    // You can have tooltips use a css class other than jqstooltip by specifying tooltipClassname
-    defaultStyles = '.jqstooltip { ' +
-            'position: absolute;' +
-            'left: 0px;' +
-            'top: 0px;' +
-            'visibility: hidden;' +
-            'background: rgb(0, 0, 0) transparent;' +
-            'background-color: rgba(0,0,0,0.6);' +
-            'filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000);' +
-            '-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)";' +
-            'color: white;' +
-            'font: 10px arial, san serif;' +
-            'text-align: left;' +
-            'white-space: nowrap;' +
-            'padding: 5px;' +
-            'border: 1px solid white;' +
-            'z-index: 10000;' +
-            '}' +
-            '.jqsfield { ' +
-            'color: white;' +
-            'font: 10px arial, san serif;' +
-            'text-align: left;' +
-            '}';
-
-    /**
-     * Utilities
-     */
-
-    createClass = function (/* [baseclass, [mixin, ...]], definition */) {
-        var Class, args;
-        Class = function () {
-            this.init.apply(this, arguments);
-        };
-        if (arguments.length > 1) {
-            if (arguments[0]) {
-                Class.prototype = $.extend(new arguments[0](), arguments[arguments.length - 1]);
-                Class._super = arguments[0].prototype;
-            } else {
-                Class.prototype = arguments[arguments.length - 1];
-            }
-            if (arguments.length > 2) {
-                args = Array.prototype.slice.call(arguments, 1, -1);
-                args.unshift(Class.prototype);
-                $.extend.apply($, args);
-            }
-        } else {
-            Class.prototype = arguments[0];
-        }
-        Class.prototype.cls = Class;
-        return Class;
-    };
-
-    clipval = function (val, min, max) {
-        if (val < min) {
-            return min;
-        }
-        if (val > max) {
-            return max;
-        }
-        return val;
-    };
-
-    quartile = function (values, q) {
-        var vl;
-        if (q === 2) {
-            vl = Math.floor(values.length / 2);
-            return values.length % 2 ? values[vl] : (values[vl-1] + values[vl]) / 2;
-        } else {
-            if (values.length % 2 ) { // odd
-                vl = (values.length * q + q) / 4;
-                return vl % 1 ? (values[Math.floor(vl)] + values[Math.floor(vl) - 1]) / 2 : values[vl-1];
-            } else { //even
-                vl = (values.length * q + 2) / 4;
-                return vl % 1 ? (values[Math.floor(vl)] + values[Math.floor(vl) - 1]) / 2 :  values[vl-1];
-
-            }
-        }
-    };
-
-    normalizeValue = function (val) {
-        var nf;
-        switch (val) {
-            case 'undefined':
-                val = undefined;
-                break;
-            case 'null':
-                val = null;
-                break;
-            case 'true':
-                val = true;
-                break;
-            case 'false':
-                val = false;
-                break;
-            default:
-                nf = parseFloat(val);
-                if (val == nf) {
-                    val = nf;
-                }
-        }
-        return val;
-    };
-
-    normalizeValues = function (vals) {
-        var i, result = [];
-        for (i = vals.length; i--;) {
-            result[i] = normalizeValue(vals[i]);
-        }
-        return result;
-    };
-
-    remove = function (vals, filter) {
-        var i, vl, result = [];
-        for (i = 0, vl = vals.length; i < vl; i++) {
-            if (vals[i] !== filter) {
-                result.push(vals[i]);
-            }
-        }
-        return result;
-    };
-
-    isNumber = function (num) {
-        return !isNaN(parseFloat(num)) && isFinite(num);
-    };
-
-    formatNumber = function (num, prec, groupsize, groupsep, decsep) {
-        var p, i;
-        num = (prec === false ? parseFloat(num).toString() : num.toFixed(prec)).split('');
-        p = (p = $.inArray('.', num)) < 0 ? num.length : p;
-        if (p < num.length) {
-            num[p] = decsep;
-        }
-        for (i = p - groupsize; i > 0; i -= groupsize) {
-            num.splice(i, 0, groupsep);
-        }
-        return num.join('');
-    };
-
-    // determine if all values of an array match a value
-    // returns true if the array is empty
-    all = function (val, arr, ignoreNull) {
-        var i;
-        for (i = arr.length; i--; ) {
-            if (ignoreNull && arr[i] === null) continue;
-            if (arr[i] !== val) {
-                return false;
-            }
-        }
-        return true;
-    };
-
-    // sums the numeric values in an array, ignoring other values
-    sum = function (vals) {
-        var total = 0, i;
-        for (i = vals.length; i--;) {
-            total += typeof vals[i] === 'number' ? vals[i] : 0;
-        }
-        return total;
-    };
-
-    ensureArray = function (val) {
-        return $.isArray(val) ? val : [val];
-    };
-
-    // http://paulirish.com/2008/bookmarklet-inject-new-css-rules/
-    addCSS = function(css) {
-        var tag;
-        //if ('\v' == 'v') /* ie only */ {
-        if (document.createStyleSheet) {
-            document.createStyleSheet().cssText = css;
-        } else {
-            tag = document.createElement('style');
-            tag.type = 'text/css';
-            document.getElementsByTagName('head')[0].appendChild(tag);
-            tag[(typeof document.body.style.WebkitAppearance == 'string') /* webkit only */ ? 'innerText' : 'innerHTML'] = css;
-        }
-    };
-
-    // Provide a cross-browser interface to a few simple drawing primitives
-    $.fn.simpledraw = function (width, height, useExisting, interact) {
-        var target, mhandler;
-        if (useExisting && (target = this.data('_jqs_vcanvas'))) {
-            return target;
-        }
-
-        if ($.fn.sparkline.canvas === false) {
-            // We've already determined that neither Canvas nor VML are available
-            return false;
-
-        } else if ($.fn.sparkline.canvas === undefined) {
-            // No function defined yet -- need to see if we support Canvas or VML
-            var el = document.createElement('canvas');
-            if (!!(el.getContext && el.getContext('2d'))) {
-                // Canvas is available
-                $.fn.sparkline.canvas = function(width, height, target, interact) {
-                    return new VCanvas_canvas(width, height, target, interact);
-                };
-            } else {
-                // Neither Canvas nor VML are available
-                $.fn.sparkline.canvas = false;
-                return false;
-            }
-        }
-
-        if (width === undefined) {
-            width = $(this).innerWidth();
-        }
-        if (height === undefined) {
-            height = $(this).innerHeight();
-        }
-
-        target = $.fn.sparkline.canvas(width, height, this, interact);
-
-        mhandler = $(this).data('_jqs_mhandler');
-        if (mhandler) {
-            mhandler.registerCanvas(target);
-        }
-        return target;
-    };
-
-    $.fn.cleardraw = function () {
-        var target = this.data('_jqs_vcanvas');
-        if (target) {
-            target.reset();
-        }
-    };
-
-    MouseHandler = createClass({
-        init: function (el, options) {
-            var $el = $(el);
-            this.$el = $el;
-            this.options = options;
-            this.currentPageX = 0;
-            this.currentPageY = 0;
-            this.el = el;
-            this.splist = [];
-            this.tooltip = null;
-            this.over = false;
-            this.displayTooltips = !options.get('disableTooltips');
-            this.highlightEnabled = !options.get('disableHighlight');
-        },
-
-        registerSparkline: function (sp) {
-            this.splist.push(sp);
-            if (this.over) {
-                this.updateDisplay();
-            }
-        },
-
-        registerCanvas: function (canvas) {
-            var $canvas = $(canvas.canvas);
-            this.canvas = canvas;
-            this.$canvas = $canvas;
-            $canvas.mouseenter($.proxy(this.mouseenter, this));
-            $canvas.mouseleave($.proxy(this.mouseleave, this));
-            $canvas.click($.proxy(this.mouseclick, this));
-        },
-
-        reset: function (removeTooltip) {
-            this.splist = [];
-            if (this.tooltip && removeTooltip) {
-                this.tooltip.remove();
-                this.tooltip = undefined;
-            }
-        },
-
-        mouseclick: function (e) {
-            var clickEvent = $.Event('sparklineClick');
-            clickEvent.originalEvent = e;
-            clickEvent.sparklines = this.splist;
-            this.$el.trigger(clickEvent);
-        },
-
-        mouseenter: function (e) {
-            $(document.body).unbind('mousemove.jqs');
-            $(document.body).bind('mousemove.jqs', $.proxy(this.mousemove, this));
-            this.over = true;
-            this.currentPageX = e.pageX;
-            this.currentPageY = e.pageY;
-            this.currentEl = e.target;
-            if (!this.tooltip && this.displayTooltips) {
-                this.tooltip = new Tooltip(this.options);
-                this.tooltip.updatePosition(e.pageX, e.pageY);
-            }
-            this.updateDisplay();
-        },
-
-        mouseleave: function () {
-            $(document.body).unbind('mousemove.jqs');
-            var splist = this.splist,
-                 spcount = splist.length,
-                 needsRefresh = false,
-                 sp, i;
-            this.over = false;
-            this.currentEl = null;
-
-            if (this.tooltip) {
-                this.tooltip.remove();
-                this.tooltip = null;
-            }
-
-            for (i = 0; i < spcount; i++) {
-                sp = splist[i];
-                if (sp.clearRegionHighlight()) {
-                    needsRefresh = true;
-                }
-            }
-
-            if (needsRefresh) {
-                this.canvas.render();
-            }
-        },
-
-        mousemove: function (e) {
-            this.currentPageX = e.pageX;
-            this.currentPageY = e.pageY;
-            this.currentEl = e.target;
-            if (this.tooltip) {
-                this.tooltip.updatePosition(e.pageX, e.pageY);
-            }
-            this.updateDisplay();
-        },
-
-        updateDisplay: function () {
-            var splist = this.splist,
-                 spcount = splist.length,
-                 needsRefresh = false,
-                 offset = this.$canvas.offset(),
-                 localX = this.currentPageX - offset.left,
-                 localY = this.currentPageY - offset.top,
-                 tooltiphtml, sp, i, result, changeEvent;
-            if (!this.over) {
-                return;
-            }
-            for (i = 0; i < spcount; i++) {
-                sp = splist[i];
-                result = sp.setRegionHighlight(this.currentEl, localX, localY);
-                if (result) {
-                    needsRefresh = true;
-                }
-            }
-            if (needsRefresh) {
-                changeEvent = $.Event('sparklineRegionChange');
-                changeEvent.sparklines = this.splist;
-                this.$el.trigger(changeEvent);
-                if (this.tooltip) {
-                    tooltiphtml = '';
-                    for (i = 0; i < spcount; i++) {
-                        sp = splist[i];
-                        tooltiphtml += sp.getCurrentRegionTooltip();
-                    }
-                    this.tooltip.setContent(tooltiphtml);
-                }
-                if (!this.disableHighlight) {
-                    this.canvas.render();
-                }
-            }
-            if (result === null) {
-                this.mouseleave();
-            }
-        }
-    });
-
-
-    Tooltip = createClass({
-        sizeStyle: 'position: static !important;' +
-            'display: block !important;' +
-            'visibility: hidden !important;' +
-            'float: left !important;',
-
-        init: function (options) {
-            var tooltipClassname = options.get('tooltipClassname', 'jqstooltip'),
-                sizetipStyle = this.sizeStyle,
-                offset;
-            this.container = options.get('tooltipContainer') || document.body;
-            this.tooltipOffsetX = options.get('tooltipOffsetX', 10);
-            this.tooltipOffsetY = options.get('tooltipOffsetY', 12);
-            // remove any previous lingering tooltip
-            $('#jqssizetip').remove();
-            $('#jqstooltip').remove();
-            this.sizetip = $('<div/>', {
-                id: 'jqssizetip',
-                style: sizetipStyle,
-                'class': tooltipClassname
-            });
-            this.tooltip = $('<div/>', {
-                id: 'jqstooltip',
-                'class': tooltipClassname
-            }).appendTo(this.container);
-            // account for the container's location
-            offset = this.tooltip.offset();
-            this.offsetLeft = offset.left;
-            this.offsetTop = offset.top;
-            this.hidden = true;
-            $(window).unbind('resize.jqs scroll.jqs');
-            $(window).bind('resize.jqs scroll.jqs', $.proxy(this.updateWindowDims, this));
-            this.updateWindowDims();
-        },
-
-        updateWindowDims: function () {
-            this.scrollTop = $(window).scrollTop();
-            this.scrollLeft = $(window).scrollLeft();
-            this.scrollRight = this.scrollLeft + $(window).width();
-            this.updatePosition();
-        },
-
-        getSize: function (content) {
-            this.sizetip.html(content).appendTo(this.container);
-            this.width = this.sizetip.width() + 1;
-            this.height = this.sizetip.height();
-            this.sizetip.remove();
-        },
-
-        setContent: function (content) {
-            if (!content) {
-                this.tooltip.css('visibility', 'hidden');
-                this.hidden = true;
-                return;
-            }
-            this.getSize(content);
-            this.tooltip.html(content)
-                .css({
-                    'width': this.width,
-                    'height': this.height,
-                    'visibility': 'visible'
-                });
-            if (this.hidden) {
-                this.hidden = false;
-                this.updatePosition();
-            }
-        },
-
-        updatePosition: function (x, y) {
-            if (x === undefined) {
-                if (this.mousex === undefined) {
-                    return;
-                }
-                x = this.mousex - this.offsetLeft;
-                y = this.mousey - this.offsetTop;
-
-            } else {
-                this.mousex = x = x - this.offsetLeft;
-                this.mousey = y = y - this.offsetTop;
-            }
-            if (!this.height || !this.width || this.hidden) {
-                return;
-            }
-
-            y -= this.height + this.tooltipOffsetY;
-            x += this.tooltipOffsetX;
-
-            if (y < this.scrollTop) {
-                y = this.scrollTop;
-            }
-            if (x < this.scrollLeft) {
-                x = this.scrollLeft;
-            } else if (x + this.width > this.scrollRight) {
-                x = this.scrollRight - this.width;
-            }
-
-            this.tooltip.css({
-                'left': x,
-                'top': y
-            });
-        },
-
-        remove: function () {
-            this.tooltip.remove();
-            this.sizetip.remove();
-            this.sizetip = this.tooltip = undefined;
-            $(window).unbind('resize.jqs scroll.jqs');
-        }
-    });
-
-    initStyles = function() {
-        addCSS(defaultStyles);
-    };
-
-    $(initStyles);
-
-    pending = [];
-    $.fn.sparkline = function (userValues, userOptions) {
-        return this.each(function () {
-            var options = new $.fn.sparkline.options(this, userOptions),
-                 $this = $(this),
-                 render, i;
-            render = function () {
-                var values, width, height, tmp, mhandler, sp, vals;
-                if (userValues === 'html' || userValues === undefined) {
-                    vals = this.getAttribute(options.get('tagValuesAttribute'));
-                    if (vals === undefined || vals === null) {
-                        vals = $this.html();
-                    }
-                    values = vals.replace(/(^\s*<!--)|(-->\s*$)|\s+/g, '').split(',');
-                } else {
-                    values = userValues;
-                }
-
-                width = options.get('width') === 'auto' ? values.length * options.get('defaultPixelsPerValue') : options.get('width');
-                if (options.get('height') === 'auto') {
-                        // must be a better way to get the line height
-                        tmp = document.createElement('span');
-                        tmp.innerHTML = 'a';
-                        $this.html(tmp);
-                        height = $(tmp).innerHeight() || $(tmp).height();
-                        $(tmp).remove();
-                        tmp = null;
-                } else {
-                    height = options.get('height');
-                }
-
-                if (!options.get('disableInteraction')) {
-                    mhandler = $.data(this, '_jqs_mhandler');
-                    if (!mhandler) {
-                        mhandler = new MouseHandler(this, options);
-                        $.data(this, '_jqs_mhandler', mhandler);
-                    } else {
-                        mhandler.reset();
-                    }
-                } else {
-                    mhandler = false;
-                }
-
-                sp = new $.fn.sparkline[options.get('type')](this, values, options, width, height);
-
-                sp.render();
-
-                if (mhandler) {
-                    mhandler.registerSparkline(sp);
-                }
-            };
-            render.call(this);
-        });
-    };
-
-    $.fn.sparkline.defaults = getDefaults();
-
-
-    $.sparkline_display_visible = function () {
-        var el, i, pl;
-        var done = [];
-        for (i = 0, pl = pending.length; i < pl; i++) {
-            el = pending[i][0];
-                pending[i][1].call(el);
-                $.data(pending[i][0], '_jqs_pending', false);
-                done.push(i);
-        }
-        for (i = done.length; i; i--) {
-            pending.splice(done[i - 1], 1);
-        }
-    };
-
-
-    /**
-     * User option handler
-     */
-    $.fn.sparkline.options = createClass({
-        init: function (tag, userOptions) {
-            var extendedOptions, defaults, base;
-            this.userOptions = userOptions = userOptions || {};
-            this.tag = tag;
-            this.tagValCache = {};
-            defaults = $.fn.sparkline.defaults;
-            base = defaults.common;
-
-            extendedOptions = defaults[userOptions.type || base.type];
-            this.mergedOptions = $.extend({}, base, extendedOptions, userOptions);
-        },
-
-
-        get: function (key, defaultval) {
-            var result;
-            return (result = this.mergedOptions[key]) === undefined ? defaultval : result;
-        }
-    });
-
-
-    $.fn.sparkline._base = createClass({
-        disabled: false,
-
-        init: function (el, values, options, width, height) {
-            this.el = el;
-            this.$el = $(el);
-            this.values = values;
-            this.options = options;
-            this.width = width;
-            this.height = height;
-            this.currentRegion = undefined;
-        },
-
-        /**
-         * Setup the canvas
-         */
-        initTarget: function () {
-            var interactive = !this.options.get('disableInteraction');
-            if (!(this.target = this.$el.simpledraw(this.width, this.height, false, interactive))) {
-                this.disabled = true;
-            } else {
-                this.canvasWidth = this.target.pixelWidth;
-                this.canvasHeight = this.target.pixelHeight;
-            }
-        },
-
-        /**
-         * Actually render the chart to the canvas
-         */
-        render: function () {
-            if (this.disabled) {
-                this.el.innerHTML = '';
-                return false;
-            }
-            return true;
-        },
-
-        /**
-         * Return a region id for a given x/y co-ordinate
-         */
-        getRegion: function (x, y) {
-        },
-
-        /**
-         * Highlight an item based on the moused-over x,y co-ordinate
-         */
-        setRegionHighlight: function (el, x, y) {
-            var currentRegion = this.currentRegion,
-                highlightEnabled = !this.options.get('disableHighlight'),
-                newRegion;
-            if (x > this.canvasWidth || y > this.canvasHeight || x < 0 || y < 0) {
-                return null;
-            }
-            newRegion = this.getRegion(el, x, y);
-            if (currentRegion !== newRegion) {
-                if (currentRegion !== undefined && highlightEnabled) {
-                    this.removeHighlight();
-                }
-                this.currentRegion = newRegion;
-                if (newRegion !== undefined && highlightEnabled) {
-                    this.renderHighlight();
-                }
-                return true;
-            }
-            return false;
-        },
-
-        /**
-         * Reset any currently highlighted item
-         */
-        clearRegionHighlight: function () {
-            if (this.currentRegion !== undefined) {
-                this.removeHighlight();
-                this.currentRegion = undefined;
-                return true;
-            }
-            return false;
-        },
-
-        renderHighlight: function () {
-            this.changeHighlight(true);
-        },
-
-        removeHighlight: function () {
-            this.changeHighlight(false);
-        },
-
-        changeHighlight: function (highlight)  {},
-
-        /**
-         * Fetch the HTML to display as a tooltip
-         */
-        getCurrentRegionTooltip: function () {
-            var options = this.options,
-                header = '',
-                entries = [],
-                fields, formats, formatlen, fclass, text, i,
-                showFields, showFieldsKey, newFields, fv,
-                formatter, format, fieldlen, j;
-            if (this.currentRegion === undefined) {
-                return '';
-            }
-            fields = this.getCurrentRegionFields();
-            formatter = options.get('tooltipFormatter');
-            if (formatter) {
-                return formatter(this, options, fields);
-            }
-            if (options.get('tooltipChartTitle')) {
-                header += '<div class="jqs jqstitle">' + options.get('tooltipChartTitle') + '</div>\n';
-            }
-            formats = this.options.get('tooltipFormat');
-            if (!formats) {
-                return '';
-            }
-            if (!$.isArray(formats)) {
-                formats = [formats];
-            }
-            if (!$.isArray(fields)) {
-                fields = [fields];
-            }
-            showFields = this.options.get('tooltipFormatFieldlist');
-            showFieldsKey = this.options.get('tooltipFormatFieldlistKey');
-            if (showFields && showFieldsKey) {
-                // user-selected ordering of fields
-                newFields = [];
-                for (i = fields.length; i--;) {
-                    fv = fields[i][showFieldsKey];
-                    if ((j = $.inArray(fv, showFields)) != -1) {
-                        newFields[j] = fields[i];
-                    }
-                }
-                fields = newFields;
-            }
-            formatlen = formats.length;
-            fieldlen = fields.length;
-            for (i = 0; i < formatlen; i++) {
-                format = formats[i];
-                fclass = format.fclass || 'jqsfield';
-                for (j = 0; j < fieldlen; j++) {
-                    if (!fields[j].isNull || !options.get('tooltipSkipNull')) {
-                        $.extend(fields[j], {
-                            prefix: options.get('tooltipPrefix'),
-                            suffix: options.get('tooltipSuffix')
-                        });
-                        text = format.render(fields[j], options.get('tooltipValueLookups'), options);
-                        entries.push('<div class="' + fclass + '">' + text + '</div>');
-                    }
-                }
-            }
-            if (entries.length) {
-                return header + entries.join('\n');
-            }
-            return '';
-        },
-
-        getCurrentRegionFields: function () {},
-
-        calcHighlightColor: function (color, options) {
-            var highlightColor = options.get('highlightColor'),
-                lighten = options.get('highlightLighten'),
-                parse, mult, rgbnew, i;
-            if (highlightColor) {
-                return highlightColor;
-            }
-            if (lighten) {
-                // extract RGB values
-                parse = /^#([0-9a-f])([0-9a-f])([0-9a-f])$/i.exec(color) || /^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i.exec(color);
-                if (parse) {
-                    rgbnew = [];
-                    mult = color.length === 4 ? 16 : 1;
-                    for (i = 0; i < 3; i++) {
-                        rgbnew[i] = clipval(Math.round(parseInt(parse[i + 1], 16) * mult * lighten), 0, 255);
-                    }
-                    return 'rgb(' + rgbnew.join(',') + ')';
-                }
-
-            }
-            return color;
-        }
-
-    });
-
-    barHighlightMixin = {
-        changeHighlight: function (highlight) {
-            var currentRegion = this.currentRegion,
-                target = this.target,
-                shapeids = this.regionShapes[currentRegion],
-                newShapes;
-            // will be null if the region value was null
-            if (shapeids) {
-                newShapes = this.renderRegion(currentRegion, highlight);
-                if ($.isArray(newShapes) || $.isArray(shapeids)) {
-                    target.replaceWithShapes(shapeids, newShapes);
-                    this.regionShapes[currentRegion] = $.map(newShapes, function (newShape) {
-                        return newShape.id;
-                    });
-                } else {
-                    target.replaceWithShape(shapeids, newShapes);
-                    this.regionShapes[currentRegion] = newShapes.id;
-                }
-            }
-        },
-
-        render: function () {
-            var values = this.values,
-                target = this.target,
-                regionShapes = this.regionShapes,
-                shapes, ids, i, j;
-
-            if (!this.cls._super.render.call(this)) {
-                return;
-            }
-            for (i = values.length; i--;) {
-                shapes = this.renderRegion(i);
-                if (shapes) {
-                    if ($.isArray(shapes)) {
-                        ids = [];
-                        for (j = shapes.length; j--;) {
-                            shapes[j].append();
-                            ids.push(shapes[j].id);
-                        }
-                        regionShapes[i] = ids;
-                    } else {
-                        shapes.append();
-                        regionShapes[i] = shapes.id; // store just the shapeid
-                    }
-                } else {
-                    // null value
-                    regionShapes[i] = null;
-                }
-            }
-            target.render();
-        }
-    };
-
-    /**
-     * Bar charts
-     */
-    $.fn.sparkline.bar = bar = createClass($.fn.sparkline._base, barHighlightMixin, {
-        type: 'bar',
-
-        init: function (el, values, options, width, height) {
-            var barWidth = parseInt(options.get('barWidth'), 10),
-                barSpacing = parseInt(options.get('barSpacing'), 10),
-                chartRangeMin = options.get('chartRangeMin'),
-                chartRangeMax = options.get('chartRangeMax'),
-                chartRangeClip = options.get('chartRangeClip'),
-                groupMin, groupMax,
-                numValues, i, vlen, range, zeroAxis, xaxisOffset, min, max, clipMin, clipMax,
-                vlist, j, slen, svals, val, yoffset, yMaxCalc, canvasHeightEf;
-            bar._super.init.call(this, el, values, options, width, height);
-
-            this.regionShapes = {};
-            this.barWidth = barWidth;
-            this.barSpacing = barSpacing;
-            this.totalBarWidth = barWidth + barSpacing;
-            this.width = width = (values.length * barWidth) + ((values.length - 1) * barSpacing);
-
-            this.initTarget();
-
-            if (chartRangeClip) {
-                clipMin = chartRangeMin === undefined ? -Infinity : chartRangeMin;
-                clipMax = chartRangeMax === undefined ? Infinity : chartRangeMax;
-            }
-
-            numValues = [];
-            for (i = 0, vlen = values.length; i < vlen; i++) {
-                    val = chartRangeClip ? clipval(values[i], clipMin, clipMax) : values[i];
-                    val = values[i] = normalizeValue(val);
-                    if (val !== null) {
-                        numValues.push(val);
-                    }
-            }
-            this.max = max = Math.max.apply(Math, numValues);
-            this.min = min = Math.min.apply(Math, numValues);
-
-            if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < min)) {
-                min = options.get('chartRangeMin');
-            }
-            if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > max)) {
-                max = options.get('chartRangeMax');
-            }
-
-            this.zeroAxis = zeroAxis = options.get('zeroAxis', true);
-            if (min <= 0 && max >= 0 && zeroAxis) {
-                xaxisOffset = 0;
-            } else if (zeroAxis == false) {
-                xaxisOffset = min;
-            } else if (min > 0) {
-                xaxisOffset = min;
-            } else {
-                xaxisOffset = max;
-            }
-            this.xaxisOffset = xaxisOffset;
-
-            range = max - min;
-
-            // as we plot zero/min values a single pixel line, we add a pixel to all other
-            // values - Reduce the effective canvas size to suit
-            this.canvasHeightEf = (zeroAxis && min < 0) ? this.canvasHeight - 2 : this.canvasHeight - 1;
-
-            if (min < xaxisOffset) {
-                yMaxCalc = max;
-                yoffset = (yMaxCalc - xaxisOffset) / range * this.canvasHeight;
-                if (yoffset !== Math.ceil(yoffset)) {
-                    this.canvasHeightEf -= 2;
-                    yoffset = Math.ceil(yoffset);
-                }
-            } else {
-                yoffset = this.canvasHeight;
-            }
-            this.yoffset = yoffset;
-
-            this.range = range;
-        },
-
-        getRegion: function (el, x, y) {
-            var result = Math.floor(x / this.totalBarWidth);
-            return (result < 0 || result >= this.values.length) ? undefined : result;
-        },
-
-        getCurrentRegionFields: function () {
-            var currentRegion = this.currentRegion,
-                values = ensureArray(this.values[currentRegion]),
-                result = [],
-                value, i;
-            for (i = values.length; i--;) {
-                value = values[i];
-                result.push({
-                    isNull: value === null,
-                    value: value,
-                    color: this.calcColor(i, value, currentRegion),
-                    offset: currentRegion
-                });
-            }
-            return result;
-        },
-
-        calcColor: function (stacknum, value, valuenum) {
-            var color, newColor,
-	        options = this.options;
-                color = (value < 0) ? options.get('negBarColor') : options.get('barColor');
-            if (value === 0 && options.get('zeroColor') !== undefined) {
-                color = options.get('zeroColor');
-            }
-            return color;
-        },
-
-        /**
-         * Render bar(s) for a region
-         */
-        renderRegion: function (valuenum, highlight) {
-            var vals = this.values[valuenum],
-                options = this.options,
-                xaxisOffset = this.xaxisOffset,
-                result = [],
-                range = this.range,
-                target = this.target,
-                x = valuenum * this.totalBarWidth,
-                canvasHeightEf = this.canvasHeightEf,
-                yoffset = this.yoffset,
-                y, height, color, isNull, yoffsetNeg, i, valcount, val, minPlotted, allMin;
-
-            vals = $.isArray(vals) ? vals : [vals];
-            valcount = vals.length;
-            val = vals[0];
-            isNull = all(null, vals);
-            allMin = all(xaxisOffset, vals, true);
-
-            if (isNull) {
-                if (options.get('nullColor')) {
-                    color = highlight ? options.get('nullColor') : this.calcHighlightColor(options.get('nullColor'), options);
-                    y = (yoffset > 0) ? yoffset - 1 : yoffset;
-                    return target.drawRect(x, y, this.barWidth - 1, 0, color, color);
-                } else {
-                    return undefined;
-                }
-            }
-            yoffsetNeg = yoffset;
-            for (i = 0; i < valcount; i++) {
-                val = vals[i];
-
-                if (range > 0) {
-                    height = Math.floor(canvasHeightEf * ((Math.abs(val - xaxisOffset) / range))) + 1;
-                } else {
-                    height = 1;
-                }
-                if (val < xaxisOffset || (val === xaxisOffset && yoffset === 0)) {
-                    y = yoffsetNeg;
-                    yoffsetNeg += height;
-                } else {
-                    y = yoffset - height;
-                    yoffset -= height;
-                }
-                color = this.calcColor(i, val, valuenum);
-                if (highlight) {
-                    color = this.calcHighlightColor(color, options);
-                }
-                result.push(target.drawRect(x, y, this.barWidth - 1, height - 1, color, color));
-            }
-            if (result.length === 1) {
-                return result[0];
-            }
-            return result;
-        }
-    });
-
-    // Setup a very simple "virtual canvas" to make drawing the few shapes we need easier
-    // This is accessible as $(foo).simpledraw()
-
-    VShape = createClass({
-        init: function (target, id, type, args) {
-            this.target = target;
-            this.id = id;
-            this.type = type;
-            this.args = args;
-        },
-        append: function () {
-            this.target.appendShape(this);
-            return this;
-        }
-    });
-
-    VCanvas_base = createClass({
-        _pxregex: /(\d+)(px)?\s*$/i,
-
-        init: function (width, height, target) {
-            if (!width) {
-                return;
-            }
-            this.width = width;
-            this.height = height;
-            this.target = target;
-            this.lastShapeId = null;
-            if (target[0]) {
-                target = target[0];
-            }
-            $.data(target, '_jqs_vcanvas', this);
-        },
-
-        drawLine: function (x1, y1, x2, y2, lineColor, lineWidth) {
-            return this.drawShape([[x1, y1], [x2, y2]], lineColor, lineWidth);
-        },
-
-        drawShape: function (path, lineColor, fillColor, lineWidth) {
-            return this._genShape('Shape', [path, lineColor, fillColor, lineWidth]);
-        },
-
-        drawRect: function (x, y, width, height, lineColor, fillColor) {
-            return this._genShape('Rect', [x, y, width, height, lineColor, fillColor]);
-        },
-
-        getElement: function () {
-            return this.canvas;
-        },
-
-        /**
-         * Return the most recently inserted shape id
-         */
-        getLastShapeId: function () {
-            return this.lastShapeId;
-        },
-
-        /**
-         * Clear and reset the canvas
-         */
-        reset: function () {
-            alert('reset not implemented');
-        },
-
-        _insert: function (el, target) {
-            $(target).html(el);
-        },
-
-        /**
-         * Calculate the pixel dimensions of the canvas
-         */
-        _calculatePixelDims: function (width, height, canvas) {
-            // XXX This should probably be a configurable option
-            var match;
-            match = this._pxregex.exec(height);
-            if (match) {
-                this.pixelHeight = match[1];
-            } else {
-                this.pixelHeight = $(canvas).height();
-            }
-            match = this._pxregex.exec(width);
-            if (match) {
-                this.pixelWidth = match[1];
-            } else {
-                this.pixelWidth = $(canvas).width();
-            }
-        },
-
-        /**
-         * Generate a shape object and id for later rendering
-         */
-        _genShape: function (shapetype, shapeargs) {
-            var id = shapeCount++;
-            shapeargs.unshift(id);
-            return new VShape(this, id, shapetype, shapeargs);
-        },
-
-        /**
-         * Add a shape to the end of the render queue
-         */
-        appendShape: function (shape) {
-            alert('appendShape not implemented');
-        },
-
-        /**
-         * Replace one shape with another
-         */
-        replaceWithShape: function (shapeid, shape) {
-            alert('replaceWithShape not implemented');
-        },
-
-        /**
-         * Insert one shape after another in the render queue
-         */
-        insertAfterShape: function (shapeid, shape) {
-            alert('insertAfterShape not implemented');
-        },
-
-        /**
-         * Remove a shape from the queue
-         */
-        removeShapeId: function (shapeid) {
-            alert('removeShapeId not implemented');
-        },
-
-        /**
-         * Find a shape at the specified x/y co-ordinates
-         */
-        getShapeAt: function (el, x, y) {
-            alert('getShapeAt not implemented');
-        },
-
-        /**
-         * Render all queued shapes onto the canvas
-         */
-        render: function () {
-            alert('render not implemented');
-        }
-    });
-
-    VCanvas_canvas = createClass(VCanvas_base, {
-        init: function (width, height, target, interact) {
-            VCanvas_canvas._super.init.call(this, width, height, target);
-            this.canvas = document.createElement('canvas');
-            if (target[0]) {
-                target = target[0];
-            }
-            $.data(target, '_jqs_vcanvas', this);
-            $(this.canvas).css({ display: 'inline-block', width: width, height: height, verticalAlign: 'top' });
-            this._insert(this.canvas, target);
-            this._calculatePixelDims(width, height, this.canvas);
-            this.canvas.width = this.pixelWidth;
-            this.canvas.height = this.pixelHeight;
-            this.interact = interact;
-            this.shapes = {};
-            this.shapeseq = [];
-            this.currentTargetShapeId = undefined;
-            $(this.canvas).css({width: this.pixelWidth, height: this.pixelHeight});
-        },
-
-        _getContext: function (lineColor, fillColor, lineWidth) {
-            var context = this.canvas.getContext('2d');
-            if (lineColor !== undefined) {
-                context.strokeStyle = lineColor;
-            }
-            context.lineWidth = lineWidth === undefined ? 1 : lineWidth;
-            if (fillColor !== undefined) {
-                context.fillStyle = fillColor;
-            }
-            return context;
-        },
-
-        reset: function () {
-            var context = this._getContext();
-            context.clearRect(0, 0, this.pixelWidth, this.pixelHeight);
-            this.shapes = {};
-            this.shapeseq = [];
-            this.currentTargetShapeId = undefined;
-        },
-
-        _drawShape: function (shapeid, path, lineColor, fillColor, lineWidth) {
-            var context = this._getContext(lineColor, fillColor, lineWidth),
-                i, plen;
-            context.beginPath();
-            context.moveTo(path[0][0] + 0.5, path[0][1] + 0.5);
-            for (i = 1, plen = path.length; i < plen; i++) {
-                context.lineTo(path[i][0] + 0.5, path[i][1] + 0.5); // the 0.5 offset gives us crisp pixel-width lines
-            }
-            if (lineColor !== undefined) {
-                context.stroke();
-            }
-            if (fillColor !== undefined) {
-                context.fill();
-            }
-            if (this.targetX !== undefined && this.targetY !== undefined &&
-                context.isPointInPath(this.targetX, this.targetY)) {
-                this.currentTargetShapeId = shapeid;
-            }
-        },
-
-        _drawRect: function (shapeid, x, y, width, height, lineColor, fillColor) {
-            return this._drawShape(shapeid, [[x, y], [x + width, y], [x + width, y + height], [x, y + height], [x, y]], lineColor, fillColor);
-        },
-
-        appendShape: function (shape) {
-            this.shapes[shape.id] = shape;
-            this.shapeseq.push(shape.id);
-            this.lastShapeId = shape.id;
-            return shape.id;
-        },
-
-        replaceWithShape: function (shapeid, shape) {
-            var shapeseq = this.shapeseq,
-                i;
-            this.shapes[shape.id] = shape;
-            for (i = shapeseq.length; i--;) {
-                if (shapeseq[i] == shapeid) {
-                    shapeseq[i] = shape.id;
-                }
-            }
-            delete this.shapes[shapeid];
-        },
-
-        replaceWithShapes: function (shapeids, shapes) {
-            var shapeseq = this.shapeseq,
-                shapemap = {},
-                sid, i, first;
-
-            for (i = shapeids.length; i--;) {
-                shapemap[shapeids[i]] = true;
-            }
-            for (i = shapeseq.length; i--;) {
-                sid = shapeseq[i];
-                if (shapemap[sid]) {
-                    shapeseq.splice(i, 1);
-                    delete this.shapes[sid];
-                    first = i;
-                }
-            }
-            for (i = shapes.length; i--;) {
-                shapeseq.splice(first, 0, shapes[i].id);
-                this.shapes[shapes[i].id] = shapes[i];
-            }
-
-        },
-
-        insertAfterShape: function (shapeid, shape) {
-            var shapeseq = this.shapeseq,
-                i;
-            for (i = shapeseq.length; i--;) {
-                if (shapeseq[i] === shapeid) {
-                    shapeseq.splice(i + 1, 0, shape.id);
-                    this.shapes[shape.id] = shape;
-                    return;
-                }
-            }
-        },
-
-        removeShapeId: function (shapeid) {
-            var shapeseq = this.shapeseq,
-                i;
-            for (i = shapeseq.length; i--;) {
-                if (shapeseq[i] === shapeid) {
-                    shapeseq.splice(i, 1);
-                    break;
-                }
-            }
-            delete this.shapes[shapeid];
-        },
-
-        getShapeAt: function (el, x, y) {
-            this.targetX = x;
-            this.targetY = y;
-            this.render();
-            return this.currentTargetShapeId;
-        },
-
-        render: function () {
-            var shapeseq = this.shapeseq,
-                shapes = this.shapes,
-                shapeCount = shapeseq.length,
-                context = this._getContext(),
-                shapeid, shape, i;
-            context.clearRect(0, 0, this.pixelWidth, this.pixelHeight);
-            for (i = 0; i < shapeCount; i++) {
-                shapeid = shapeseq[i];
-                shape = shapes[shapeid];
-                this['_draw' + shape.type].apply(this, shape.args);
-            }
-            if (!this.interact) {
-                // not interactive so no need to keep the shapes array
-                this.shapes = {};
-                this.shapeseq = [];
-            }
-        }
-
-    });
-}))}(document, Math));
diff --git a/www/js/json_delta.js b/www/js/json_delta.js
index 91b17e1..f6417df 100644
--- a/www/js/json_delta.js
+++ b/www/js/json_delta.js
@@ -29,7 +29,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 This implementation is based heavily on the original python2 version:
 see http://www.phil-roberts.name/json-delta/ for further
 documentation.  */
-JSON_delta = {
+const JSON_delta = {
     isStrictlyEqual: function (left, right) {
 	if (this.isTerminal(left) && this.isTerminal(right)) {
 	    return (left === right);
@@ -41,7 +41,7 @@ JSON_delta = {
 	    if (left.length != right.length) {
 		return false;
 	    }
-	    for (idx in left) {
+	    for (let idx in left) {
 		if ( ! this.isStrictlyEqual(left[idx], right[idx])) {
 		    return false;
 		}
@@ -55,7 +55,7 @@ JSON_delta = {
 	if (ks[1].length != 0 || ks[2].length != 0) {
 	    return false;
 	}
-	for (key in ks[0]) {
+	for (let key in ks[0]) {
 	    key = ks[0][key];
 	    if ( ! this.isStrictlyEqual(left[key], right[key])) {
 		return false
@@ -75,7 +75,7 @@ JSON_delta = {
     splitDeletions: function (diff) {
 	if (diff.length == 0) {return [[], diff]}
 	diff.sort(function (a,b) {return b.length-a.length});
-	for (idx in diff) {
+	for (var idx in diff) {
 	    if (diff[idx].length === 1) {break}
 	}
 	return [diff.slice(0,idx), diff.slice(idx)]
@@ -109,7 +109,7 @@ JSON_delta = {
 	var target = overlap;
 	var targ_num = (left instanceof Array);
 
-	for (key in left) {
+	for (let key in left) {
 	    if (targ_num) {
 		key = Number(key)
 	    }
@@ -121,7 +121,7 @@ JSON_delta = {
 	    }
 	    target.push(key);
 	}
-	for (key in right) {
+	for (let key in right) {
 	    if (targ_num) {
 		key = Number(key)
 	    }
@@ -135,12 +135,13 @@ JSON_delta = {
     commonality: function (left, right) {
 	var com = 0;
 	var tot = 0;
+        var elem;
 	if (this.isTerminal(left) || this.isTerminal(right)) {
 	    return 0;
 	}
 
 	if ((left instanceof Array) && (right instanceof Array)) {
-	    for (idx in left) {
+	    for (let idx in left) {
 		elem = left[idx];
 		if (right.indexOf(elem) != -1) {
 		    com += 1;
@@ -153,10 +154,10 @@ JSON_delta = {
 	}
 	else {
             var ks = this.computeKeysets(left, right);
-            o = ks[0]; l = ks[1]; r = ks[2];
+            let o = ks[0]; let l = ks[1]; let r = ks[2];
 	    com = o.length;
 	    tot = o.length + l.length + r.length;
-	    for (idx in r) {
+	    for (let idx in r) {
 		elem = r[idx];
 		if (l.indexOf(elem) == -1) {
 		    tot += 1
@@ -180,18 +181,18 @@ JSON_delta = {
 
 	if (common) {
 	    var ks = this.computeKeysets(left, right);
-	    for (idx in ks[0]) {
-		okey = ks[0][idx];
+	    for (let idx in ks[0]) {
+		let okey = ks[0][idx];
 		if (left[okey] != right[okey]) {
 		    out.push([key.concat([okey]), right[okey]]);
 		}
 	    }
-	    for (idx in ks[1]) {
-		okey = ks[1][idx];
+	    for (let idx in ks[1]) {
+		let okey = ks[1][idx];
 		out.push([key.concat([okey])]);
 	    }
-	    for (idx in ks[2]) {
-		okey = ks[2][idx];
+	    for (let idx in ks[2]) {
+		let okey = ks[2][idx];
 		out.push([key.concat([okey]), right[okey]]);
 	    }
 	    return out
@@ -207,13 +208,13 @@ JSON_delta = {
     keysetDiff: function (left, right, key) {
 	var out = [];
 	var ks = this.computeKeysets(left, right);
-	for (k in ks[1]) {
+	for (let k in ks[1]) {
 	    out.push([key.concat(ks[1][k])]);
 	}
-	for (k in ks[2]) {
+	for (let k in ks[2]) {
 	    out.push([key.concat(ks[2][k]), right[ks[2][k]]]);
 	}
-	for (k in ks[0]) {
+	for (let k in ks[0]) {
 	    out = out.concat(this.diff(left[ks[0][k]], right[ks[0][k]],
 				       key.concat([ks[0][k]])))
 	}
@@ -223,7 +224,7 @@ JSON_delta = {
     patchStanza: function (struc, diff) {
 	// Applies the diff stanza diff to the structure struc.  Returns
 	// the modified structure.
-	key = diff[0];
+	let key = diff[0];
 	switch (key.length) {
 	case 0:
 	    struc = diff[1];
@@ -242,9 +243,9 @@ JSON_delta = {
 	    }
 	    break;
 	default:
-	    pass_key = key.slice(1);
-	    pass_struc = struc[key[0]];
-	    pass_diff = [pass_key].concat(diff.slice(1));
+	    let pass_key = key.slice(1);
+	    let pass_struc = struc[key[0]];
+	    let pass_diff = [pass_key].concat(diff.slice(1));
 	    struc[key[0]] = this.patchStanza(pass_struc, pass_diff);
 	}
 	return struc;
@@ -253,7 +254,7 @@ JSON_delta = {
     patch: function (struc, diff) {
 	// Applies the sequence of diff stanzas diff to the structure
 	// struc, and returns the patched structure.
-	for (stan_key in diff) {
+	for (let stan_key in diff) {
 	    struc = this.patchStanza(struc, diff[stan_key]);
 	}
 	return struc
@@ -265,7 +266,7 @@ JSON_delta = {
 	var dumbdiff = [[key, right]]
 	var my_diff = [];
 
-	common = this.commonality(left, right);
+	let common = this.commonality(left, right);
 	if (common < 0.5) {
 	    my_diff = this.thisLevelDiff(left, right, key, common);
 	}
diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index bed5a5c..d36bf9e 100644
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -1,13 +1,14 @@
 (function() {
+'use strict';
 
 /**
  * Version of this script. If the server returns a version larger than
  * this, it is a sign we should reload to upgrade ourselves.
  *
- * @type {Number}
+ * @type {number}
  * @const
  * @private */
-var SCRIPT_VERSION = 2016113008;
+let SCRIPT_VERSION = 2023122700;
 
 /**
  * The current backend URL.
@@ -15,14 +16,14 @@ var SCRIPT_VERSION = 2016113008;
  * @type {!string}
  * @private
  */
-var backend_url = "/analysis.pl";
-var backend_hash_url = "/hash";
+let backend_url = "/analysis.pl";
+let backend_hash_url = "/hash";
 
 /** @type {window.ChessBoard} @private */
-var board = null;
+let board = null;
 
 /** @type {boolean} @private */
-var board_is_animating = false;
+let board_is_animating = false;
 
 /**
  * The most recent analysis data we have from the server
@@ -30,7 +31,7 @@ var board_is_animating = false;
  *
  * @type {?Object}
  * @private */
-var current_analysis_data = null;
+let current_analysis_data = null;
 
 /**
  * If we are displaying previous analysis or from hash, this is non-null,
@@ -39,7 +40,7 @@ var current_analysis_data = null;
  * @type {?Object}
  * @private
  */
-var displayed_analysis_data = null;
+let displayed_analysis_data = null;
 
 /**
  * Games currently in progress, if any.
@@ -54,7 +55,7 @@ var displayed_analysis_data = null;
  * }>}
  * @private
  */
-var current_games = null;
+let current_games = null;
 
 /** @type {Array.<{
  *      from_col: number,
@@ -67,65 +68,78 @@ var current_games = null;
  * }>}
  * @private
  */
-var arrows = [];
+let arrows = [];
 
 /** @type {Array.<Array.<boolean>>} */
-var occupied_by_arrows = [];
+let occupied_by_arrows = [];
 
 /** Currently displayed refutation lines (on-screen).
  * Can either come from the current_analysis_data, displayed_analysis_data,
- * or hash_refutation_lines.
+ * or hash_refutation_lines (choose_displayed_refutation_lines() chooses which one).
+ *
+ * @typedef {{
+ *     score: Array,
+ *     depth: string,
+ *     pv: Array.<string>,
+ *     move: string
+ * }}
+ * @private
  */
-var refutation_lines = [];
+var RefutationLine;
 
 /** Refutation lines from current hash probe.
- *
  * If non-null, will override refutation lines from the base position.
- * Note that these are relative to display_fen, not base_fen.
+ *
+ * @type {Array.<RefutationLine>}
  */
-var hash_refutation_lines = null;
-
-/** @type {!number} @private */
-var move_num = 1;
+let hash_refutation_lines = null;
 
-/** @type {!string} @private */
-var toplay = 'W';
+/**
+ * What FEN hash_refutation_lines is relative to.
+ */
+let hash_refutation_lines_base_fen = null;
 
 /** @type {number} @private */
-var ims = 0;
+let ims = 0;
 
 /** @type {boolean} @private */
-var truncate_display_history = true;
+let truncate_display_history = true;
 
 /** @type {!string|undefined} @private */
-var highlight_from = undefined;
+let highlight_from = undefined;
 
 /** @type {!string|undefined} @private */
-var highlight_to = undefined;
+let highlight_to = undefined;
 
 /** The HTML object of the move currently being highlighted (in red).
- * @type {?jQuery}
+ * @type {?Element}
  * @private */
-var highlighted_move = null;
+let highlighted_move = null;
 
 /** Currently suggested/recommended move when dragging.
  * @type {?{from: !string, to: !string}}
  * @private
  */
-var recommended_move = null;
+let recommended_move = null;
 
 /** If reverse-dragging (dragging from the destination square to the
  * source square), the destination square.
  * @type {?string}
  * @private
  */
-var reverse_dragging_from = null;
+let reverse_dragging_from = null;
 
 /** @type {?number} @private */
-var unique = null;
+let unique = null;
+
+/** @type {?string} @private */
+let admin_password = null;
 
 /** @type {boolean} @private */
-var enable_sound = false;
+let enable_sound = false;
+
+/** @type {!number} @private */
+let delay_ms = 0;
 
 /**
  * Our best estimate of how many milliseconds we need to add to 
@@ -135,36 +149,40 @@ var enable_sound = false;
  * @type {?number}
  * @private
  */
-var client_clock_offset_ms = null;
+let client_clock_offset_ms = null;
 
-var clock_timer = null;
+let clock_timer = null;
 
 /** The current position being analyzed, represented as a FEN string.
  * Note that this is not necessarily the same as display_fen.
  * @type {?string}
  * @private
  */
-var base_fen = null;
+let base_fen = null;
 
 /** The current position on the board, represented as a FEN string.
  * Note that board.fen() does not contain e.g. who is to play.
  * @type {?string}
  * @private
  */
-var display_fen = null;
+let display_fen = null;
 
 /** @typedef {{
  *    start_fen: string,
  *    pv: Array.<string>,
- *    move_num: number,
- *    toplay: string,
  *    scores: Array<{first_move: number, score: Object}>,
  *    start_display_move_num: number
- * }} DisplayLine
+ * }}
+ *
+ * "start_display_move_num" is the (half-)move number to start displaying the PV at,
+ * i.e., the index into pv.
  *
- * "start_display_move_num" is the (half-)move number to start displaying the PV at.
- * "score" is also evaluated at this point.
+ * "score" is also evaluated at this point. scores can be empty and is frequently
+ * sparse; it's generally only really useful for history (we obviously don't know
+ * much about how the score will * move during e.g. a PV, except that a mate/TB
+ * counter might go down).
  */
+var DisplayLine;
 
 /** All PVs that we currently know of.
  *
@@ -175,61 +193,65 @@ var display_fen = null;
  * @type {Array.<DisplayLine>}
  * @private
  */
-var display_lines = [];
+let display_lines = [];
 
 /** @type {?DisplayLine} @private */
-var current_display_line = null;
+let current_display_line = null;
 
 /** @type {boolean} @private */
-var current_display_line_is_history = false;
+let current_display_line_is_history = false;
 
-/** @type {?number} @private */
-var current_display_move = null;
+/** @type {?number} @private
+ *
+ * The highlighted/used/shown move in current_display_line.pv, in terms of absolute index
+ * (not relative to e.g. the start FEN).
+ */
+let current_display_move = null;
 
 /**
  * The current backend request to get main analysis (not history), if any,
  * so that we can abort it.
  *
- * @type {?jqXHR}
+ * @type {?AbortController}
  * @private
  */
-var current_analysis_xhr = null;
+let current_analysis_xhr = null;
 
 /**
  * The current timer to fire off a request to get main analysis (not history),
  * if any, so that we can abort it.
  *
- * @type {?Number}
+ * @type {?number}
  * @private
  */
-var current_analysis_request_timer = null;
+let current_analysis_request_timer = null;
 
 /**
  * The current backend request to get historic data, if any.
  *
- * @type {?jqXHR}
+ * @type {?AbortController}
  * @private
  */
-var current_historic_xhr = null;
+let current_historic_xhr = null;
 
 /**
  * The current backend request to get hash probes, if any, so that we can abort it.
  *
- * @type {?jqXHR}
+ * @type {?AbortController}
  * @private
  */
-var current_hash_xhr = null;
+let current_hash_xhr = null;
 
 /**
  * The current timer to display hash probe information (it could be waiting on the
  * board to stop animating), if any, so that we can abort it.
  *
- * @type {?Number}
+ * @type {?number}
  * @private
  */
-var current_hash_display_timer = null;
+let current_hash_display_timer = null;
 
-var supports_html5_storage = function() {
+function supports_html5_storage() {
 	try {
 		return 'localStorage' in window && window['localStorage'] !== null;
 	} catch (e) {
@@ -239,92 +261,117 @@ var supports_html5_storage = function() {
 
 // Make the unique token persistent so people refreshing the page won't count twice.
 // Of course, you can never fully protect against people deliberately wanting to spam.
-var get_unique = function() {
-	var use_local_storage = supports_html5_storage();
-	if (use_local_storage && localStorage['unique']) {
-		return localStorage['unique'];
+function get_unique() {
+	let use_local_storage = supports_html5_storage();
+	if (use_local_storage && window['localStorage']['unique']) {
+		return window['localStorage']['unique'];
 	}
-	var unique = Math.random();
+	let unique = Math.random();
 	if (use_local_storage) {
-		localStorage['unique'] = unique;
+		window['localStorage']['unique'] = unique;
 	}
 	return unique;
 }
 
-var request_update = function() {
+function request_update() {
 	current_analysis_request_timer = null;
 
-	current_analysis_xhr = $.ajax({
-		url: backend_url + "?ims=" + ims + "&unique=" + unique
-	}).done(function(data, textstatus, xhr) {
-		sync_server_clock(xhr.getResponseHeader('Date'));
-		ims = xhr.getResponseHeader('X-RGLM');
-		var num_viewers = xhr.getResponseHeader('X-RGNV');
-		var new_data;
-		if (Array.isArray(data)) {
-			new_data = JSON.parse(JSON.stringify(current_analysis_data));
-			JSON_delta.patch(new_data, data);
-		} else {
-			new_data = data;
-		}
+	let handle_err = () => {
+		// Backend error or similar. Wait ten seconds, then try again.
+		current_analysis_request_timer = setTimeout(function() { request_update(); }, 10000);
+	};
 
-		var minimum_version = xhr.getResponseHeader('X-RGMV');
-		if (minimum_version && minimum_version > SCRIPT_VERSION) {
-			// Upgrade to latest version with a force-reload.
-			location.reload(true);
-		}
+	current_analysis_xhr = new AbortController();
+	const signal = current_analysis_xhr.signal;
+	fetch(backend_url + "?ims=" + ims + "&unique=" + unique, { signal })
+		.then((response) => response.json().then(data => ({ok: response.ok, headers: response.headers, json: data})))  // ick
+		.then((obj) => {
+			if (!obj.ok) {
+				handle_err();
+				return;
+			}
 
-		// Verify that the PV makes sense.
-		var valid = true;
-		if (new_data['pv']) {
-			var hiddenboard = new Chess(new_data['position']['fen']);
-			for (var i = 0; i < new_data['pv'].length; ++i) {
-				if (hiddenboard.move(new_data['pv'][i]) === null) {
-					valid = false;
-					break;
-				}
+			if (delay_ms === 0) {
+				process_update_response(obj.json, obj.headers);
+			} else {
+				setTimeout(function() { process_update_response(obj.json, obj.headers); }, delay_ms);
 			}
-		}
 
-		var timeout = 100;
-		if (valid) {
-			possibly_play_sound(current_analysis_data, new_data);
-			current_analysis_data = new_data;
-			update_board();
-			update_num_viewers(num_viewers);
-		} else {
-			console.log("Received invalid update, waiting five seconds and trying again.");
-			setTimeout(function() { location.reload(true); }, 5000);
-		}
+			// Next update.
+			if (!backend_url.match(/history/)) {
+				let timeout = 100;
+				current_analysis_request_timer = setTimeout(function() { request_update(); }, timeout);
+			}
+		})
+		.catch((err) => {
+			if (err.name === 'AbortError') {
+				// Aborted because we are switching backends. Abandon and don't retry,
+				// because another one is already started for us.
+			} else {
+				console.log(err);
+				handle_err(err);
+			}
+		})
+		.finally(() => {
+			// Display.
+			document.body.style.opacity = null;
+		})
 
-		// Next update.
-		if (!backend_url.match(/history/)) {
-			current_analysis_request_timer = setTimeout(function() { request_update(); }, timeout);
-		}
-	}).fail(function(jqXHR, textStatus, errorThrown) {
-		if (textStatus === "abort") {
-			// Aborted because we are switching backends. Abandon and don't retry,
-			// because another one is already started for us.
-		} else {
-			// Backend error or similar. Wait ten seconds, then try again.
-			current_analysis_request_timer = setTimeout(function() { request_update(); }, 10000);
+}
+
+function process_update_response(data, headers) {
+	sync_server_clock(headers.get('Date'));
+	ims = headers.get('X-RGLM');
+	let num_viewers = headers.get('X-RGNV');
+	let new_data;
+	if (Array.isArray(data)) {
+		new_data = JSON.parse(JSON.stringify(current_analysis_data));
+		JSON_delta.patch(new_data, data);
+	} else {
+		new_data = data;
+	}
+
+	let minimum_version = headers.get('X-RGMV');
+	if (minimum_version && minimum_version > SCRIPT_VERSION) {
+		// Upgrade to latest version with a force-reload.
+		location.reload(true);
+	}
+
+	// Verify that the PV makes sense.
+	let valid = true;
+	if (new_data['pv']) {
+		let hiddenboard = new Chess(new_data['position']['fen']);
+		for (let i = 0; i < new_data['pv'].length; ++i) {
+			if (hiddenboard.move(new_data['pv'][i]) === null) {
+				valid = false;
+				break;
+			}
 		}
-	});
+	}
+
+	if (valid) {
+		possibly_play_sound(current_analysis_data, new_data);
+		current_analysis_data = new_data;
+		update_board();
+		update_num_viewers(num_viewers);
+	} else {
+		console.log("Received invalid update, waiting five seconds and trying again.");
+		setTimeout(function() { location.reload(true); }, 5000);
+	}
 }
 
-var possibly_play_sound = function(old_data, new_data) {
+function possibly_play_sound(old_data, new_data) {
 	if (!enable_sound) {
 		return;
 	}
 	if (old_data === null) {
 		return;
 	}
-	var ding = document.getElementById('ding');
+	let ding = document.getElementById('ding');
 	if (ding && ding.play) {
 		if (old_data['position'] && old_data['position']['fen'] &&
 		    new_data['position'] && new_data['position']['fen'] &&
-		    (old_data['position']['fen'] !== new_data['position']['fen'] ||
-		     old_data['position']['move_num'] !== new_data['position']['move_num'])) {
+		    old_data['position']['fen'] !== new_data['position']['fen']) {
 			ding.play();
 		}
 	}
@@ -333,10 +380,10 @@ var possibly_play_sound = function(old_data, new_data) {
 /**
  * @type {!string} server_date_string
  */
-var sync_server_clock = function(server_date_string) {
-	var server_time_ms = new Date(server_date_string).getTime();
-	var client_time_ms = new Date().getTime();
-	var estimated_offset_ms = server_time_ms - client_time_ms;
+function sync_server_clock(server_date_string) {
+	let server_time_ms = new Date(server_date_string).getTime();
+	let client_time_ms = new Date().getTime();
+	let estimated_offset_ms = server_time_ms - client_time_ms;
 
 	// In order not to let the noise move us too much back and forth
 	// (the server only has one-second resolution anyway), we only
@@ -347,33 +394,60 @@ var sync_server_clock = function(server_date_string) {
 	}
 }
 
-var clear_arrows = function() {
-	for (var i = 0; i < arrows.length; ++i) {
+function clear_arrows() {
+	for (let i = 0; i < arrows.length; ++i) {
 		if (arrows[i].svg) {
-			if (arrows[i].svg.parentElement) {
-				arrows[i].svg.parentElement.removeChild(arrows[i].svg);
-			}
+			arrows[i].svg.remove();
 			delete arrows[i].svg;
 		}
 	}
 	arrows = [];
 
 	occupied_by_arrows = [];
-	for (var y = 0; y < 8; ++y) {
+	for (let y = 0; y < 8; ++y) {
 		occupied_by_arrows.push([false, false, false, false, false, false, false, false]);
 	}
 }
 
-var redraw_arrows = function() {
-	for (var i = 0; i < arrows.length; ++i) {
+function redraw_arrows() {
+	for (let i = 0; i < arrows.length; ++i) {
 		position_arrow(arrows[i]);
 	}
 }
 
+/** @param {!string} fen
+ * @return {!string}
+ *
+ * Return whose side it is to play (w or b), given a FEN.
+ */
+function find_toplay(fen) {
+	return fen.split(' ')[1];
+}
+
+/** @param {!string} fen
+ * @return {!number}
+ *
+ * Return the move clock, starting from 1. See also find_toplay().
+ */
+function find_move_num(fen) {
+	return parseInt(fen.split(' ')[5]);
+}
+
+/** @param {!string} fen
+ * @return {!number}
+ *
+ * Return the half-move clock, starting from 0 (and never resetting).
+ */
+function find_halfmove_num(fen) {
+	let move_num = find_move_num(fen);
+	let toplay = find_toplay(fen);
+	return (move_num - 1) * 2 + (toplay === 'w' ? 0 : 1);
+}
+
 /** @param {!number} x
  * @return {!number}
  */
-var sign = function(x) {
+function sign(x) {
 	if (x > 0) {
 		return 1;
 	} else if (x < 0) {
@@ -388,11 +462,11 @@ var sign = function(x) {
  * @param {!string} to The square the arrow is to (e.g. e4).
  * @return {boolean}
  */
-var interfering_arrow = function(from, to) {
-	var from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
-	var from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
-	var to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
-	var to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
+function interfering_arrow(from, to) {
+	let from_col = from.charCodeAt(0) - "a1".charCodeAt(0);
+	let from_row = from.charCodeAt(1) - "a1".charCodeAt(1);
+	let to_col   = to.charCodeAt(0) - "a1".charCodeAt(0);
+	let to_row   = to.charCodeAt(1) - "a1".charCodeAt(1);
 
 	occupied_by_arrows[from_row][from_col] = true;
 
@@ -403,10 +477,10 @@ var interfering_arrow = function(from, to) {
 	}
 
 	// Sliding piece: Check if anything except the from-square is seen before.
-	var dx = sign(to_col - from_col);
-	var dy = sign(to_row - from_row);
-	var x = from_col;
-	var y = from_row;
+	let dx = sign(to_col - from_col);
+	let dy = sign(to_row - from_row);
+	let x = from_col;
+	let y = from_row;
 	do {
 		x += dx;
 		y += dy;
@@ -429,16 +503,16 @@ var interfering_arrow = function(from, to) {
  * @param {!number} u
  * @return {!string} The point in "x y" form, suitable for SVG paths.
  */
-var point_from_start = function(x1, y1, x2, y2, t, u) {
-	var dx = x2 - x1;
-	var dy = y2 - y1;
+function point_from_start(x1, y1, x2, y2, t, u) {
+	let dx = x2 - x1;
+	let dy = y2 - y1;
 
-	var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
+	let norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 	dx *= norm;
 	dy *= norm;
 
-	var x = x1 + dx * t + dy * u;
-	var y = y1 + dy * t - dx * u;
+	let x = x1 + dx * t + dy * u;
+	let y = y1 + dy * t - dx * u;
 	return x + " " + y;
 }
 
@@ -452,20 +526,20 @@ var point_from_start = function(x1, y1, x2, y2, t, u) {
  * @param {!number} u
  * @return {!string} The point in "x y" form, suitable for SVG paths.
  */
-var point_from_end = function(x1, y1, x2, y2, t, u) {
-	var dx = x2 - x1;
-	var dy = y2 - y1;
+function point_from_end(x1, y1, x2, y2, t, u) {
+	let dx = x2 - x1;
+	let dy = y2 - y1;
 
-	var norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
+	let norm = 1.0 / Math.sqrt(dx * dx + dy * dy);
 	dx *= norm;
 	dy *= norm;
 
-	var x = x2 + dx * t + dy * u;
-	var y = y2 + dy * t - dx * u;
+	let x = x2 + dx * t + dy * u;
+	let y = y2 + dy * t - dx * u;
 	return x + " " + y;
 }
 
-var position_arrow = function(arrow) {
+function position_arrow(arrow) {
 	if (arrow.svg) {
 		if (arrow.svg.parentElement) {
 			arrow.svg.parentElement.removeChild(arrow.svg);
@@ -476,44 +550,41 @@ var position_arrow = function(arrow) {
 		return;
 	}
 
-	var zoom_factor = $("#board").width() / 400.0;
-	var line_width = arrow.line_width * zoom_factor;
-	var arrow_size = arrow.arrow_size * zoom_factor;
+	// We always draw as if the board is 400x400, the viewBox will adjust that for us
+	let line_width = arrow.line_width;
+	let arrow_size = arrow.arrow_size;
 
-	var square_width = $(".square-a8").width();
-	var pos, from_y, to_y, from_x, to_x;
+	let square_width = 400 / 8;
+	let from_y, to_y, from_x, to_x;
 	if (board.orientation() === 'black') {
-		pos = $(".square-h1").position();
 		from_y = (arrow.from_row + 0.5)*square_width;
 		to_y = (arrow.to_row + 0.5)*square_width;
 		from_x = (7 - arrow.from_col + 0.5)*square_width;
 		to_x = (7 - arrow.to_col + 0.5)*square_width;
 	} else {
-		pos = $(".square-a8").position();
 		from_y = (7 - arrow.from_row + 0.5)*square_width;
 		to_y = (7 - arrow.to_row + 0.5)*square_width;
 		from_x = (arrow.from_col + 0.5)*square_width;
 		to_x = (arrow.to_col + 0.5)*square_width;
 	}
 
-	var SVG_NS = "http://www.w3.org/2000/svg";
-	var XHTML_NS = "http://www.w3.org/1999/xhtml";
-	var svg = document.createElementNS(SVG_NS, "svg");
-	svg.setAttribute("width", /** @type{number} */ ($("#board").width()));
-	svg.setAttribute("height", /** @type{number} */ ($("#board").height()));
-	svg.setAttribute("style", "position: absolute");
-	svg.setAttribute("position", "absolute");
+	let SVG_NS = "http://www.w3.org/2000/svg";
+	let XHTML_NS = "http://www.w3.org/1999/xhtml";
+	let svg = document.createElementNS(SVG_NS, "svg");
+	svg.setAttribute("width", "100%");
+	svg.setAttribute("height", "100%");
+	svg.setAttribute("viewBox", "0 0 400 400");
 	svg.setAttribute("version", "1.1");
 	svg.setAttribute("class", "c1");
 	svg.setAttribute("xmlns", XHTML_NS);
 
-	var x1 = from_x;
-	var y1 = from_y;
-	var x2 = to_x;
-	var y2 = to_y;
+	let x1 = from_x;
+	let y1 = from_y;
+	let x2 = to_x;
+	let y2 = to_y;
 
 	// Draw the line.
-	var outline = document.createElementNS(SVG_NS, "path");
+	let outline = document.createElementNS(SVG_NS, "path");
 	outline.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
 	outline.setAttribute("xmlns", XHTML_NS);
 	outline.setAttribute("stroke", "#666");
@@ -521,7 +592,7 @@ var position_arrow = function(arrow) {
 	outline.setAttribute("fill", "none");
 	svg.appendChild(outline);
 
-	var path = document.createElementNS(SVG_NS, "path");
+	let path = document.createElementNS(SVG_NS, "path");
 	path.setAttribute("d", "M " + point_from_start(x1, y1, x2, y2, arrow_size / 2, 0) + " L " + point_from_end(x1, y1, x2, y2, -arrow_size / 2, 0));
 	path.setAttribute("xmlns", XHTML_NS);
 	path.setAttribute("stroke", arrow.fg_color);
@@ -530,7 +601,7 @@ var position_arrow = function(arrow) {
 	svg.appendChild(path);
 
 	// Then the arrow head.
-	var head = document.createElementNS(SVG_NS, "path");
+	let head = document.createElementNS(SVG_NS, "path");
 	head.setAttribute("d",
 		"M " +  point_from_end(x1, y1, x2, y2, 0, 0) +
 		" L " + point_from_end(x1, y1, x2, y2, -arrow_size, -arrow_size / 2) +
@@ -543,8 +614,11 @@ var position_arrow = function(arrow) {
 	head.setAttribute("fill", arrow.fg_color);
 	svg.appendChild(head);
 
-	$(svg).css({ top: pos.top, left: pos.left, 'pointer-events': 'none' });
-	document.body.appendChild(svg);
+	svg.style.position = 'absolute';
+	svg.style.top = '0px';  /* Border for .board-b72b1. */
+	svg.style.left = '0px';
+	svg.style.pointerEvents = 'none';
+	document.getElementById('board').appendChild(svg);
 	arrow.svg = svg;
 }
 
@@ -555,14 +629,14 @@ var position_arrow = function(arrow) {
  * @param {number} line_width
  * @param {number} arrow_size
  */
-var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_size) {
-	var from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
-	var from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
-	var to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
-	var to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
+function create_arrow(from_square, to_square, fg_color, line_width, arrow_size) {
+	let from_col = from_square.charCodeAt(0) - "a1".charCodeAt(0);
+	let from_row = from_square.charCodeAt(1) - "a1".charCodeAt(1);
+	let to_col   = to_square.charCodeAt(0) - "a1".charCodeAt(0);
+	let to_row   = to_square.charCodeAt(1) - "a1".charCodeAt(1);
 
 	// Create arrow.
-	var arrow = {
+	let arrow = {
 		from_col: from_col,
 		from_row: from_row,
 		to_col: to_col,
@@ -576,9 +650,9 @@ var create_arrow = function(from_square, to_square, fg_color, line_width, arrow_
 	arrows.push(arrow);
 }
 
-var compare_by_score = function(refutation_lines, invert, a, b) {
-	var sa = compute_score_sort_key(refutation_lines[b]['score'], refutation_lines[b]['depth'], invert);
-	var sb = compute_score_sort_key(refutation_lines[a]['score'], refutation_lines[a]['depth'], invert);
+function compare_by_score(refutation_lines, invert, a, b) {
+	let sa = compute_score_sort_key(refutation_lines[b]['score'], refutation_lines[b]['depth'], invert);
+	let sb = compute_score_sort_key(refutation_lines[a]['score'], refutation_lines[a]['depth'], invert);
 	return sa - sb;
 }
 
@@ -593,15 +667,15 @@ var compare_by_score = function(refutation_lines, invert, a, b) {
  * @return {Array.<string>} The FEN representation (e.g. Ne4) of all
  *     moves, in score order.
  */
-var find_nonstupid_moves = function(data, margin, invert) {
+function find_nonstupid_moves(data, margin, invert) {
 	// First of all, if there are any moves that are more than 0.5 ahead of
 	// the primary move, the refutation lines are probably bunk, so just
 	// kill them all. 
-	var best_score = undefined;
-	var pv_score = undefined;
-	for (var move in data['refutation_lines']) {
-		var line = data['refutation_lines'][move];
-		var score = compute_score_sort_key(line['score'], line['depth'], invert, false);
+	let best_score = undefined;
+	let pv_score = undefined;
+	for (let move in data['refutation_lines']) {
+		let line = data['refutation_lines'][move];
+		let score = compute_score_sort_key(line['score'], line['depth'], invert);
 		if (move == data['pv'][0]) {
 			pv_score = score;
 		}
@@ -619,15 +693,16 @@ var find_nonstupid_moves = function(data, margin, invert) {
 
 	// Now find all moves that are within “margin” of the best score.
 	// The PV move will always be first.
-	var moves = [];
-	for (var move in data['refutation_lines']) {
-		var line = data['refutation_lines'][move];
-		var score = compute_score_sort_key(line['score'], line['depth'], invert);
+	let moves = [];
+	for (let move in data['refutation_lines']) {
+		let line = data['refutation_lines'][move];
+		let score = compute_score_sort_key(line['score'], line['depth'], invert);
 		if (move != data['pv'][0] && best_score - score <= margin) {
 			moves.push(move);
 		}
 	}
-	moves = moves.sort(function(a, b) { return compare_by_score(data['refutation_lines'], data['position']['toplay'] === 'B', a, b) });
+	let toplay = find_toplay(data['position']['fen']);
+	moves = moves.sort(function(a, b) { return compare_by_score(data['refutation_lines'], toplay, a, b) });
 	moves.unshift(data['pv'][0]);
 
 	return moves;
@@ -637,229 +712,271 @@ var find_nonstupid_moves = function(data, margin, invert) {
  * @param {number} x
  * @return {!string}
  */
-var thousands = function(x) {
+function thousands(x) {
 	return String(x).split('').reverse().join('').replace(/(\d{3}\B)/g, '$1,').split('').reverse().join('');
 }
 
 /**
  * @param {!string} start_fen
  * @param {Array.<string>} pv
- * @param {number} move_num
- * @param {!string} toplay
- * @param {Array<{ first_move: integer, score: Object }>} scores
+ * @param {Array<{ first_move: number, score: Object }>} scores
  * @param {number} start_display_move_num
  * @param {number=} opt_limit
  * @param {boolean=} opt_showlast
  */
-var add_pv = function(start_fen, pv, move_num, toplay, scores, start_display_move_num, opt_limit, opt_showlast) {
+function add_pv(start_fen, pv, scores, start_display_move_num, opt_limit, opt_showlast) {
 	display_lines.push({
 		start_fen: start_fen,
 		pv: pv,
-		move_num: parseInt(move_num),
-		toplay: toplay,
 		scores: scores,
 		start_display_move_num: start_display_move_num
 	});
-	return print_pv(display_lines.length - 1, opt_limit, opt_showlast);
+	let splicepos = null;
+	if (scores !== null && scores.length >= 1 &&
+	    scores[scores.length - 1].score !== undefined &&
+	    scores[scores.length - 1].score !== null &&
+	    (scores[scores.length - 1].score[0] === 'T' ||
+	     scores[scores.length - 1].score[0] === 't')) {
+		splicepos = scores[scores.length - 1].score[1];
+	}
+	return print_pv(display_lines.length - 1, splicepos, opt_limit, opt_showlast);
 }
 
 /**
  * @param {number} line_num
+ * @param {?number} splicepos If non-null, where the tablebase-spliced portion of the TB starts.
  * @param {number=} opt_limit If set, show at most this number of moves.
  * @param {boolean=} opt_showlast If limit is set, show the last moves instead of the first ones.
  */
-var print_pv = function(line_num, opt_limit, opt_showlast) {
-	var display_line = display_lines[line_num];
-	var pv = display_line.pv;
-	var move_num = display_line.move_num;
-	var toplay = display_line.toplay;
+function print_pv(line_num, splicepos, opt_limit, opt_showlast) {
+	let display_line = display_lines[line_num];
+	let pv = display_line.pv;
+	let halfmove_num = find_halfmove_num(display_line.start_fen) + 2;  // From two, for simplicity.
+	let start_halfmove_num = halfmove_num;
+
+	let ret = document.createDocumentFragment();
 
 	// Truncate PV at the start if needed.
-	var start_display_move_num = display_line.start_display_move_num;
-	if (start_display_move_num > 0) {
-		pv = pv.slice(start_display_move_num);
-		var to_add = start_display_move_num;
-		if (toplay === 'B') {
-			++move_num;
-			toplay = 'W';
-			--to_add;
-		}
-		if (to_add % 2 == 1) {
-			toplay = 'B';
-			--to_add;
-		}
-		move_num += to_add / 2;
-	}
-
-	var ret = '';
-	var i = 0;
-	if (opt_limit && opt_showlast && pv.length > opt_limit) {
-		// Truncate the PV at the beginning (instead of at the end).
-		// We assume here that toplay is 'W'. We also assume that if
-		// opt_showlast is set, then it is the history, and thus,
-		// the UI should be to expand the history.
-		ret = '(<a class="move" href="javascript:collapse_history(false)">…</a>) ';
-		i = pv.length - opt_limit;
-		if (i % 2 == 1) {
-			++i;
-		}
-		move_num += i / 2;
-	} else if (toplay == 'B' && pv.length > 0) {
-		var move = "<a class=\"move\" id=\"automove" + line_num + "-0\" href=\"javascript:show_line(" + line_num + ", " + 0 + ");\">" + pv[0] + "</a>";
-		ret = move_num + '. … ' + move;
-		toplay = 'W';
-		++i;
-		++move_num;
-	}
-	for ( ; i < pv.length; ++i) {
-		var move = "<a class=\"move\" id=\"automove" + line_num + "-" + i + "\" href=\"javascript:show_line(" + line_num + ", " + i + ");\">" + pv[i] + "</a>";
-
-		if (toplay == 'W') {
-			if (i > opt_limit && !opt_showlast) {
-				return ret + ' (…)';
+	let to_skip = display_line.start_display_move_num;
+	if (opt_limit && opt_showlast && pv.length - to_skip > opt_limit) {
+		// Explicit (UI-visible) truncation from the start, for the history.
+		ret.appendChild(document.createTextNode('('));
+		let link = document.createElement('a');
+		link.className = 'move';
+		link.href = 'javascript:collapse_history(false)';
+		link.textContent = '…';
+		ret.appendChild(link);
+		ret.appendChild(document.createTextNode(') '));
+		to_skip = pv.length - opt_limit;
+		to_skip += to_skip % 2;  // Make sure it starts on a white move.
+	}
+	if (to_skip > 0) {
+		pv = pv.slice(to_skip);
+		halfmove_num += to_skip;
+		if (splicepos !== null) {
+			splicepos -= to_skip;
+			if (splicepos < 0) {
+				splicepos = 0;
 			}
-			if (ret != '') {
-				ret += ' ';
+		}
+	}
+
+	// The initial move number needs to go before any (TB: …) marker.
+	if (halfmove_num % 2 == 1) {
+		// Black move.
+		ret.appendChild(document.createTextNode((halfmove_num - 1) / 2 + '. … '));
+	} else {
+		// White move.
+		ret.appendChild(document.createTextNode(halfmove_num / 2 + '. '));
+	}
+	let in_tb = false;
+	for (let i = 0; i < pv.length; ++i, ++halfmove_num) {
+		let prefix = '';
+		if (splicepos === i) {
+			prefix = '(TB:';
+			in_tb = true;
+		}
+
+		if (halfmove_num % 2 == 0 && i != 0) {
+			if (i > opt_limit && !opt_showlast) {
+				if (in_tb) {
+					prefix += ')';
+				}
+				ret.appendChild(document.createTextNode(prefix + ' (…)'));
+				return ret;
 			}
-			ret += move_num + '. ' + move;
-			++move_num;
-			toplay = 'B';
+			prefix += ' ' + (halfmove_num / 2) + '. ';
 		} else {
-			ret += ' ' + move;
-			toplay = 'W';
+			prefix += ' ';
 		}
+		ret.appendChild(document.createTextNode(prefix));
+
+		let link = document.createElement('a');
+		link.className = 'move';
+		link.setAttribute('id', 'automove' + line_num + '-' + (halfmove_num - start_halfmove_num));
+		link.textContent = pv[i];
+		link.href = 'javascript:show_line(' + line_num + ', ' + (halfmove_num - start_halfmove_num) + ');';
+		ret.appendChild(link);
+	}
+	if (in_tb) {
+		ret.appendChild(document.createTextNode(')'));
 	}
 	return ret;
 }
 
 /** Update the highlighted to/from squares on the board.
- * Based on the global "highlight_from" and "highlight_to" variables.
+ * Based on the global "highlight_from" and "highlight_to" letiables.
  */
-var update_board_highlight = function() {
-	$("#board").find('.square-55d63').removeClass('nonuglyhighlight');
+function update_board_highlight() {
+	document.getElementById("board").querySelectorAll('.square-55d63').forEach((square) => square.classList.remove('nonuglyhighlight'));
 	if ((current_display_line === null || current_display_line_is_history) &&
 	    highlight_from !== undefined && highlight_to !== undefined) {
-		$("#board").find('.square-' + highlight_from).addClass('nonuglyhighlight');
-		$("#board").find('.square-' + highlight_to).addClass('nonuglyhighlight');
+		document.getElementById("board").querySelector('.square-' + highlight_from).classList.add('nonuglyhighlight');
+		document.getElementById("board").querySelector('.square-' + highlight_to).classList.add('nonuglyhighlight');
 	}
 }
 
-var update_history = function() {
+function update_history() {
+	let history = document.getElementById('history');
 	if (display_lines[0] === null || display_lines[0].pv.length == 0) {
-		$("#history").html("No history");
+		history.textContent = 'No history';
 	} else if (truncate_display_history) {
-		$("#history").html(print_pv(0, 8, true));
+		history.replaceChildren(print_pv(0, null, 8, true));
 	} else {
-		$("#history").html(
-			'(<a class="move" href="javascript:collapse_history(true)">collapse</a>) ' +
-			print_pv(0));
+		history.textContent = '(';
+		let link = document.createElement('a');
+		link.className = 'move';
+		link.href = 'javascript:collapse_history(true)';
+		link.textContent = 'collapse';
+		history.appendChild(link);
+		history.appendChild(document.createTextNode(') '));
+		history.append(print_pv(0, null));
 	}
 }
 
 /**
  * @param {!boolean} truncate_history
  */
-var collapse_history = function(truncate_history) {
+function collapse_history(truncate_history) {
 	truncate_display_history = truncate_history;
 	update_history();
 }
 window['collapse_history'] = collapse_history;
 
-/** Update the HTML display of multi-PV from the global "refutation_lines".
+function choose_displayed_refutation_lines() {
+	if (hash_refutation_lines) {
+		// If we're in hash exploration, that takes precedence.
+		return [hash_refutation_lines, hash_refutation_lines_base_fen];
+	} else {
+		let data = displayed_analysis_data || current_analysis_data;
+		return [data['refutation_lines'], data['position']['fen']];
+	}
+}
+
+/** Update the HTML display of multi-PV.
  *
  * Also recreates the global "display_lines".
  */
-var update_refutation_lines = function() {
-	if (base_fen === null) {
+function update_refutation_lines() {
+	const [refutation_lines, refutation_lines_base_fen] = choose_displayed_refutation_lines();
+	if (!refutation_lines) {
 		return;
 	}
 	if (display_lines.length > 2) {
 		// Truncate so that only the history and PV is left.
 		display_lines = [ display_lines[0], display_lines[1] ];
 	}
-	var tbl = $("#refutationlines");
-	tbl.empty();
+	let tbl = document.getElementById("refutationlines");
+	tbl.replaceChildren();
 
 	if (display_lines.length < 2) {
+		// Update the move highlight, as we've rewritten all the HTML.
+		update_move_highlight();
 		return;
 	}
 
 	// Find out where the lines start from.
-	var base_line = [];
-	var base_scores = display_lines[1].scores;
-	var start_display_move_num = 0;
+	let base_line = [];
+	let base_scores = display_lines[1].scores;
+	let start_display_move_num = 0;
 	if (hash_refutation_lines) {
 		base_line = current_display_line.pv.slice(0, current_display_move + 1);
 		base_scores = current_display_line.scores;
 		start_display_move_num = base_line.length;
 	}
 
-	var moves = [];
-	for (var move in refutation_lines) {
+	let moves = [];
+	for (let move in refutation_lines) {
 		moves.push(move);
 	}
 
-	var invert = (toplay === 'B');
+	let invert = (find_toplay(refutation_lines_base_fen) === 'b');
 	if (current_display_line && current_display_move % 2 == 0 && !current_display_line_is_history) {
 		invert = !invert;
 	}
 	moves = moves.sort(function(a, b) { return compare_by_score(refutation_lines, invert, a, b) });
-	for (var i = 0; i < moves.length; ++i) {
-		var line = refutation_lines[moves[i]];
+	for (let i = 0; i < moves.length; ++i) {
+		let line = refutation_lines[moves[i]];
 
-		var tr = document.createElement("tr");
+		let tr = document.createElement("tr");
 
-		var move_td = document.createElement("td");
+		let move_td = document.createElement("td");
 		tr.appendChild(move_td);
-		$(move_td).addClass("move");
+		move_td.classList.add("move");
 
-		var scores = base_scores.concat([{ first_move: start_display_move_num, score: line['score'] }]);
+		let scores = base_scores.concat([{ first_move: start_display_move_num, score: line['score'] }]);
 
 		if (line['pv'].length == 0) {
 			// Not found, so just make a one-move PV.
-			var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
-			$(move_td).html(move);
-			var score_td = document.createElement("td");
-
-			$(score_td).addClass("score");
-			$(score_td).text("—");
+			let link = document.createElement('a');
+			link.className = 'move';
+			link.href = 'javascript:show_line(' + display_lines.length + ', ' + 0 + ')';
+			link.textContent = line['move'];
+			move_td.replaceChildren(link);
+
+			let score_td = document.createElement("td");
+			score_td.classList.add("score");
+			score_td.textContent = "—";
 			tr.appendChild(score_td);
 
-			var depth_td = document.createElement("td");
+			let depth_td = document.createElement("td");
 			tr.appendChild(depth_td);
-			$(depth_td).addClass("depth");
-			$(depth_td).text("—");
+			depth_td.classList.add("depth");
+			depth_td.textContent = "—";
 
-			var pv_td = document.createElement("td");
+			let pv_td = document.createElement("td");
 			tr.appendChild(pv_td);
-			$(pv_td).addClass("pv");
-			$(pv_td).html(add_pv(base_fen, base_line.concat([ line['move'] ]), move_num, toplay, scores, start_display_move_num));
+			pv_td.classList.add("pv");
+			pv_td.append(add_pv(refutation_lines_base_fen, base_line.concat([ line['move'] ]), scores, start_display_move_num));
 
 			tbl.append(tr);
 			continue;
 		}
 
-		var move = "<a class=\"move\" href=\"javascript:show_line(" + display_lines.length + ", " + 0 + ");\">" + line['move'] + "</a>";
-		$(move_td).html(move);
+		let move_link = document.createElement("a");
+		move_link.classList.add("move");
+		move_link.setAttribute("href", "javascript:show_line(" + display_lines.length + ", 0)");
+		move_link.textContent = line['move'];
+		move_td.appendChild(move_link);
 
-		var score_td = document.createElement("td");
+		let score_td = document.createElement("td");
 		tr.appendChild(score_td);
-		$(score_td).addClass("score");
-		$(score_td).text(format_short_score(line['score']));
+		score_td.classList.add("score");
+		score_td.textContent = format_short_score(line['score']);
 
-		var depth_td = document.createElement("td");
+		let depth_td = document.createElement("td");
 		tr.appendChild(depth_td);
-		$(depth_td).addClass("depth");
+		depth_td.classList.add("depth");
 		if (line['depth'] && line['depth'] >= 0) {
-			$(depth_td).text("d" + line['depth']);
+			depth_td.textContent = "d" + line['depth'];
 		} else {
-			$(depth_td).text("—");
+			depth_td.textContent = "—";
 		}
 
-		var pv_td = document.createElement("td");
+		let pv_td = document.createElement("td");
 		tr.appendChild(pv_td);
-		$(pv_td).addClass("pv");
-		$(pv_td).html(add_pv(base_fen, base_line.concat(line['pv']), move_num, toplay, scores, start_display_move_num, 10));
+		pv_td.classList.add("pv");
+		pv_td.append(add_pv(refutation_lines_base_fen, base_line.concat(line['pv']), scores, start_display_move_num, 10));
 
 		tbl.append(tr);
 	}
@@ -876,12 +993,12 @@ var update_refutation_lines = function() {
  * @param {Array.<string>} moves
  * @param {number} last_move
  */
-var chess_from = function(fen, moves, last_move) {
-	var hiddenboard = new Chess();
+function chess_from(fen, moves, last_move) {
+	let hiddenboard = new Chess();
 	if (fen !== null && fen !== undefined) {
 		hiddenboard.load(fen);
 	}
-	for (var i = 0; i <= last_move; ++i) {
+	for (let i = 0; i <= last_move; ++i) {
 		if (moves[i] === '0-0') {
 			hiddenboard.move('O-O');
 		} else if (moves[i] === '0-0-0') {
@@ -893,25 +1010,25 @@ var chess_from = function(fen, moves, last_move) {
 	return hiddenboard;
 }
 
-var update_game_list = function(games) {
-	$("#games").text("");
+function update_game_list(games) {
+	document.getElementById("games").textContent = "";
 	if (games === null) {
 		return;
 	}
 
-	var games_div = document.getElementById('games');
-	for (var game_num = 0; game_num < games.length; ++game_num) {
-		var game = games[game_num];
-		var game_span = document.createElement("span");
+	let games_div = document.getElementById('games');
+	for (let game_num = 0; game_num < games.length; ++game_num) {
+		let game = games[game_num];
+		let game_span = document.createElement("span");
 		game_span.setAttribute("class", "game");
 
-		var game_name = document.createTextNode(game['name']);
+		let game_name = document.createTextNode(game['name']);
 		if (game['url'] === backend_url) {
 			// This game.
 			game_span.appendChild(game_name);
 
 			if (current_analysis_data && current_analysis_data['position']) {
-				var score;
+				let score;
 				if (current_analysis_data['position']['result']) {
 					score = " (" + current_analysis_data['position']['result'] + ")";
 				} else {
@@ -921,12 +1038,12 @@ var update_game_list = function(games) {
 			}
 		} else {
 			// Some other game.
-			var game_a = document.createElement("a");
+			let game_a = document.createElement("a");
 			game_a.setAttribute("href", "#" + game['id']);
 			game_a.appendChild(game_name);
 			game_span.appendChild(game_a);
 
-			var score;
+			let score;
 			if (game['result']) {
 				score = " (" + game['result'] + ")";
 			} else {
@@ -943,11 +1060,11 @@ var update_game_list = function(games) {
  * Try to find a running game that matches with the current hash,
  * and switch to it if we're not already displaying it.
  */
-var possibly_switch_game_from_hash = function() {
-	var history_match = window.location.hash.match(/^#history=([a-zA-Z0-9_-]+)/);
+function possibly_switch_game_from_hash() {
+	let history_match = window.location.hash.match(/^#history=([a-zA-Z0-9_-]+)/);
 	if (history_match !== null) {
-		var game_id = history_match[1];
-		var fake_game = {
+		let game_id = history_match[1];
+		let fake_game = {
 			url: '/history/' + game_id + '.json',
 			hashurl: '',
 			id: 'history=' + game_id
@@ -960,8 +1077,8 @@ var possibly_switch_game_from_hash = function() {
 		return;
 	}
 
-	var hash = window.location.hash.replace(/^#/,'');
-	for (var i = 0; i < current_games.length; ++i) {
+	let hash = window.location.hash.replace(/^#/,'');
+	for (let i = 0; i < current_games.length; ++i) {
 		if (current_games[i]['id'] === hash) {
 			if (backend_url !== current_games[i]['url']) {
 				switch_backend(current_games[i]);
@@ -975,14 +1092,14 @@ var possibly_switch_game_from_hash = function() {
  * If this is a Chess960 castling which doesn't move the king,
  * move the rook instead.
 */
-var patch_move = function(move) {
+function patch_move(move) {
 	if (move === null) return null;
 	if (move.from !== move.to) return move;
 
-	var f = move.rook_sq & 15;
-	var r = move.rook_sq >> 4;
-	var from = ('abcdefgh'.substring(f,f+1) + '87654321'.substring(r,r+1));
-	var to = move.to;
+	let f = move.rook_sq & 15;
+	let r = move.rook_sq >> 4;
+	let from = ('abcdefgh'.substring(f,f+1) + '87654321'.substring(r,r+1));
+	let to = move.to;
 
 	if (move.to === 'g1') {
 		to = 'f1';
@@ -999,9 +1116,11 @@ var patch_move = function(move) {
 
 /** Update all the HTML on the page, based on current global state.
  */
-var update_board = function() {
-	var data = displayed_analysis_data || current_analysis_data;
-	var current_data = current_analysis_data;  // Convenience alias.
+function update_board() {
+	document.body.style.opacity = null;
+
+	let data = displayed_analysis_data || current_analysis_data;
+	let current_data = current_analysis_data;  // Convenience alias.
 
 	display_lines = [];
 
@@ -1009,8 +1128,8 @@ var update_board = function() {
 	// unconditionally taken from current_data (we're not interested in
 	// historic history).
 	if (current_data['position']['history']) {
-		var start = (current_data['position'] && current_data['position']['start_fen']) ? current_data['position']['start_fen'] : 'start';
-		add_pv(start, current_data['position']['history'], 1, 'W', null, 0, 8, true);
+		let start = (current_data['position'] && current_data['position']['start_fen']) ? current_data['position']['start_fen'] : 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
+		add_pv(start, current_data['position']['history'], null, 0, 8, true);
 	} else {
 		display_lines.push(null);
 	}
@@ -1027,7 +1146,7 @@ var update_board = function() {
 
 	// The headline. Names are always fetched from current_data;
 	// the rest can depend a bit.
-	var headline;
+	let headline;
 	if (current_data &&
 	    current_data['position']['player_w'] && current_data['position']['player_b']) {
 		headline = current_data['position']['player_w'] + '–' +
@@ -1036,51 +1155,42 @@ var update_board = function() {
 		headline = 'Analysis';
 	}
 
-	// Credits, where applicable. Note that we don't want the footer to change a lot
-	// when e.g. viewing history, so if any of these changed during the game,
-	// use the current one still.
-	if (current_data['using_lomonosov']) {
-		$("#lomonosov").show();
-	} else {
-		$("#lomonosov").hide();
-	}
-
 	// Credits: The engine name/version.
 	if (current_data['engine'] && current_data['engine']['name'] !== null) {
-		$("#engineid").text(current_data['engine']['name']);
+		document.getElementById("engineid").textContent = current_data['engine']['name'];
 	}
 
 	// Credits: The engine URL.
 	if (current_data['engine'] && current_data['engine']['url']) {
-		$("#engineid").attr("href", current_data['engine']['url']);
+		document.getElementById("engineid").setAttribute("href", current_data['engine']['url']);
 	} else {
-		$("#engineid").removeAttr("href");
+		document.getElementById("engineid").removeAttribute("href");
 	}
 
 	// Credits: Engine details.
 	if (current_data['engine'] && current_data['engine']['details']) {
-		$("#enginedetails").text(" (" + current_data['engine']['details'] + ")");
+		document.getElementById("enginedetails").textContent = " (" + current_data['engine']['details'] + ")";
 	} else {
-		$("#enginedetails").text("");
+		document.getElementById("enginedetails").textContent = "";
 	}
 
 	// Credits: Move source, possibly with URL.
 	if (current_data['move_source'] && current_data['move_source_url']) {
-		$("#movesource").text("Moves provided by ");
-		var movesource_a = document.createElement("a");
+		document.getElementById("movesource").textContent = "Moves provided by ";
+		let movesource_a = document.createElement("a");
 		movesource_a.setAttribute("href", current_data['move_source_url']);
-		var movesource_text = document.createTextNode(current_data['move_source']);
+		let movesource_text = document.createTextNode(current_data['move_source']);
 		movesource_a.appendChild(movesource_text);
-		var movesource_period = document.createTextNode(".");
+		let movesource_period = document.createTextNode(".");
 		document.getElementById("movesource").appendChild(movesource_a);
 		document.getElementById("movesource").appendChild(movesource_period);
 	} else if (current_data['move_source']) {
-		$("#movesource").text("Moves provided by " + current_data['move_source'] + ".");
+		document.getElementById("movesource").textContent = "Moves provided by " + current_data['move_source'] + ".";
 	} else {
-		$("#movesource").text("");
+		document.getElementById("movesource").textContent = "";
 	}
 
-	var last_move;
+	let last_move;
 	if (displayed_analysis_data) {
 		// Displaying some non-current position, pick out the last move
 		// from the history. This will work even if the fetch failed.
@@ -1092,27 +1202,28 @@ var update_board = function() {
 		}
 	} else if (data['position']['last_move'] !== 'none') {
 		// Find the previous move.
-		var previous_move_num, previous_toplay;
-		if (data['position']['toplay'] == 'B') {
-			previous_move_num = data['position']['move_num'];
-			previous_toplay = 'W';
+		let previous_move_num, previous_toplay;
+		let fen = data['position']['fen'];
+		if (find_toplay(fen) === 'b') {
+			previous_move_num = find_move_num(fen);
+			previous_toplay = 'w';
 		} else {
-			previous_move_num = data['position']['move_num'] - 1;
-			previous_toplay = 'B';
+			previous_move_num = find_move_num(fen) - 1;
+			previous_toplay = 'b';
 		}
 
 		last_move = format_move_with_number(
 			data['position']['last_move'],
 			previous_move_num,
-			previous_toplay == 'W');
+			previous_toplay == 'w');
 		headline += ' after ' + last_move;
 	} else {
 		last_move = null;
 	}
-	$("#headline").text(headline);
+	document.getElementById("headline").textContent = headline;
 
 	// The <title> contains a very brief headline.
-	var title_elems = [];
+	let title_elems = [];
 	if (data['position'] && data['position']['result']) {
 		title_elems.push(data['position']['result']);
 	} else if (data['score']) {
@@ -1136,9 +1247,9 @@ var update_board = function() {
 		// We don't have historic analysis for this position, but we
 		// can reconstruct what the last move was by just replaying
 		// from the start.
-		var position = (data['position'] && data['position']['start_fen']) ? data['position']['start_fen'] : null;
-		var hiddenboard = chess_from(position, current_display_line.pv, current_display_move);
-		var moves = hiddenboard.history({ verbose: true });
+		let position = (data['position'] && data['position']['start_fen']) ? data['position']['start_fen'] : null;
+		let hiddenboard = chess_from(position, current_display_line.pv, current_display_move);
+		let moves = hiddenboard.history({ verbose: true });
 		last_move = moves.pop();
 		highlight_from = last_move.from;
 		highlight_to = last_move.to;
@@ -1148,14 +1259,13 @@ var update_board = function() {
 	update_board_highlight();
 
 	if (data['failed']) {
-		$("#score").text("No analysis for this move");
-		$("#pvtitle").text("PV:");
-		$("#pv").empty();
-		$("#searchstats").html("&nbsp;");
-		$("#refutationlines").empty();
-		$("#whiteclock").empty();
-		$("#blackclock").empty();
-		refutation_lines = [];
+		document.getElementById("score").textContent = "No analysis for this move";
+		document.getElementById("pvtitle").textContent = "PV:";
+		document.getElementById("pv").replaceChildren();
+		document.getElementById("searchstats").innerHTML = "&nbsp;";
+		document.getElementById("refutationlines").replaceChildren();
+		document.getElementById("whiteclock").replaceChildren();
+		document.getElementById("blackclock").replaceChildren();
 		update_refutation_lines();
 		clear_arrows();
 		update_displayed_line();
@@ -1163,13 +1273,16 @@ var update_board = function() {
 		return;
 	}
 
+	if (clock_timer !== null) {
+		clearTimeout(clock_timer);
+	}
 	update_clock();
 
 	// The score.
 	if (current_display_line && !current_display_line_is_history) {
-		var score;
+		let score;
 		if (current_display_line.scores && current_display_line.scores.length > 0) {
-			for (var i = 0; i < current_display_line.scores.length; ++i) {
+			for (let i = 0; i < current_display_line.scores.length; ++i) {
 				if (current_display_move < current_display_line.scores[i].first_move) {
 					break;
 				}
@@ -1177,21 +1290,19 @@ var update_board = function() {
 			}
 		}
 		if (score) {
-			$("#score").text(format_long_score(score));
+			document.getElementById("score").textContent = format_long_score(score);
 		} else {
-			$("#score").text("No score for this line");
+			document.getElementById("score").textContent = "No score for this line";
 		}
 	} else if (data['score']) {
-		$("#score").text(format_long_score(data['score']));
+		document.getElementById("score").textContent = format_long_score(data['score']);
 	}
 
 	// The search stats.
 	if (data['searchstats']) {
-		$("#searchstats").html(data['searchstats']);
-	} else if (data['tablebase'] == 1) {
-		$("#searchstats").text("Tablebase result");
+		document.getElementById("searchstats").textContent = data['searchstats'];
 	} else if (data['nodes'] && data['nps'] && data['depth']) {
-		var stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
+		let stats = thousands(data['nodes']) + ' nodes, ' + thousands(data['nps']) + ' nodes/sec, depth ' + data['depth'] + ' ply';
 		if (data['seldepth']) {
 			stats += ' (' + data['seldepth'] + ' selective)';
 		}
@@ -1203,9 +1314,12 @@ var update_board = function() {
 			}
 		}
 
-		$("#searchstats").text(stats);
+		document.getElementById("searchstats").textContent = stats;
 	} else {
-		$("#searchstats").text("");
+		document.getElementById("searchstats").textContent = "";
+	}
+	if (admin_password !== null) {
+		document.getElementById("searchstats").innerHTML += " | <span style=\"color: red;\">ADMIN MODE (if password is right) | <a href=\"javascript:undo_move()\">Undo move</a></span>";
 	}
 
 	// Update the board itself.
@@ -1213,20 +1327,21 @@ var update_board = function() {
 	update_displayed_line();
 
 	// Print the PV.
-	$("#pvtitle").text("PV:");
+	document.getElementById("pvtitle").textContent = "PV:";
 
-	var scores = [{ first_move: -1, score: data['score'] }];
-	$("#pv").html(add_pv(data['position']['fen'], data['pv'], data['position']['move_num'], data['position']['toplay'], scores, 0));
+	let scores = [{ first_move: -1, score: data['score'] }];
+	document.getElementById("pv").replaceChildren(add_pv(data['position']['fen'], data['pv'], scores, 0));
 
 	// Update the PV arrow.
 	clear_arrows();
+	let toplay = find_toplay(data['position']['fen']);
 	if (data['pv'].length >= 1) {
-		var hiddenboard = new Chess(base_fen);
+		let hiddenboard = new Chess(base_fen);
 
 		// draw a continuation arrow as long as it's the same piece
-		var last_to;
-		for (var i = 0; i < data['pv'].length; i += 2) {
-			var move = patch_move(hiddenboard.move(data['pv'][i]));
+		let last_to;
+		for (let i = 0; i < data['pv'].length; i += 2) {
+			let move = patch_move(hiddenboard.move(data['pv'][i]));
 
 			if ((i >= 2 && move.from != last_to) ||
 			     interfering_arrow(move.from, move.to)) {
@@ -1237,10 +1352,10 @@ var update_board = function() {
 			hiddenboard.move(data['pv'][i + 1]);  // To keep continuity.
 		}
 
-		var alt_moves = find_nonstupid_moves(data, 30, data['position']['toplay'] === 'B');
-		for (var i = 1; i < alt_moves.length && i < 3; ++i) {
+		let alt_moves = find_nonstupid_moves(data, 30, toplay === 'b');
+		for (let i = 1; i < alt_moves.length && i < 3; ++i) {
 			hiddenboard = new Chess(base_fen);
-			var move = patch_move(hiddenboard.move(alt_moves[i]));
+			let move = patch_move(hiddenboard.move(alt_moves[i]));
 			if (move !== null) {
 				create_arrow(move.from, move.to, '#f66', 1, 10);
 			}
@@ -1249,14 +1364,11 @@ var update_board = function() {
 
 	// See if all semi-reasonable moves have only one possible response.
 	if (data['pv'].length >= 2) {
-		var nonstupid_moves = find_nonstupid_moves(data, 300, data['position']['toplay'] === 'B');
-		var response;
-		{
-			var hiddenboard = new Chess(base_fen);
-			hiddenboard.move(data['pv'][0]);
-			response = hiddenboard.move(data['pv'][1]);
-		}
-		for (var i = 0; i < nonstupid_moves.length; ++i) {
+		let nonstupid_moves = find_nonstupid_moves(data, 300, toplay === 'b');
+		let hiddenboard = new Chess(base_fen);
+		hiddenboard.move(data['pv'][0]);
+		let response = hiddenboard.move(data['pv'][1]);
+		for (let i = 0; i < nonstupid_moves.length; ++i) {
 			if (nonstupid_moves[i] == data['pv'][0]) {
 				// ignore the PV move for refutation lines.
 				continue;
@@ -1269,10 +1381,15 @@ var update_board = function() {
 				response = undefined;
 				break;
 			}
-			var line = data['refutation_lines'][nonstupid_moves[i]];
+			let line = data['refutation_lines'][nonstupid_moves[i]];
 			hiddenboard = new Chess(base_fen);
 			hiddenboard.move(line['pv'][0]);
-			var this_response = hiddenboard.move(line['pv'][1]);
+			let this_response = hiddenboard.move(line['pv'][1]);
+			if (this_response === null) {
+				console.log("BUG: ", i);
+				console.log(data);
+				console.log(line['pv']);
+			}
 			if (response.from !== this_response.from || response.to !== this_response.to) {
 				// Different response depending on lines, abort.
 				response = undefined;
@@ -1285,49 +1402,44 @@ var update_board = function() {
 		}
 	}
 
-	// Update the refutation lines.
 	base_fen = data['position']['fen'];
-	move_num = parseInt(data['position']['move_num']);
-	toplay = data['position']['toplay'];
-	refutation_lines = hash_refutation_lines || data['refutation_lines'];
 	update_refutation_lines();
 
 	// Update the sparkline last, since its size depends on how everything else reflowed.
 	update_sparkline(data);
 }
 
-var update_sparkline = function(data) {
+function update_sparkline(data) {
+	let scorespark = document.getElementById('scoresparkcontainer');
+	scorespark.textContent = '';
 	if (data && data['score_history']) {
-		var first_move_num = undefined;
-		for (var halfmove_num in data['score_history']) {
+		let first_move_num = undefined;
+		for (let halfmove_num in data['score_history']) {
 			halfmove_num = parseInt(halfmove_num);
 			if (first_move_num === undefined || halfmove_num < first_move_num) {
 				first_move_num = halfmove_num;
 			}
 		}
 		if (first_move_num !== undefined) {
-			var last_move_num = data['position']['move_num'] * 2 - 3;
-			if (data['position']['toplay'] === 'B') {
+			let fen = data['position']['fen'];
+			let last_move_num = find_move_num(fen) * 2 - 3;
+			if (find_toplay(fen) === 'b') {
 				++last_move_num;
 			}
 
 			// Possibly truncate some moves if we don't have enough width.
-			// FIXME: Sometimes width() for #scorecontainer (and by extent,
-			// #scoresparkcontainer) on Chrome for mobile seems to start off
-			// at something very small, and then suddenly snap back into place.
-			// Figure out why.
-			var max_moves = Math.floor($("#scoresparkcontainer").width() / 5) - 5;
+			let max_moves = Math.floor(scorespark.getBoundingClientRect().width / 5) - 3;
 			if (last_move_num - first_move_num > max_moves) {
 				first_move_num = last_move_num - max_moves;
 			}
 
-			var min_score = -100;
-			var max_score = 100;
-			var last_score = null;
-			var scores = [];
-			for (var halfmove_num = first_move_num; halfmove_num <= last_move_num; ++halfmove_num) {
+			let min_score = -1;
+			let max_score = 1;
+			let last_score = null;
+			let scores = [];
+			for (let halfmove_num = first_move_num; halfmove_num <= last_move_num; ++halfmove_num) {
 				if (data['score_history'][halfmove_num]) {
-					var score = compute_plot_score(data['score_history'][halfmove_num]);
+					let score = compute_plot_score(data['score_history'][halfmove_num]);
 					last_score = score;
 					if (score < min_score) min_score = score;
 					if (score > max_score) max_score = score;
@@ -1335,82 +1447,144 @@ var update_sparkline = function(data) {
 				scores.push(last_score);
 			}
 			if (data['score']) {
-				scores.push(compute_plot_score(data['score']));
+				let score = compute_plot_score(data['score']);
+				scores.push(score);
+				if (score < min_score) min_score = score;
+				if (score > max_score) max_score = score;
 			}
-			// FIXME: at some widths, calling sparkline() seems to push
-			// #scorecontainer under the board.
-			$("#scorespark").sparkline(scores, {
-				type: 'bar',
-				zeroColor: 'gray',
-				chartRangeMin: min_score,
-				chartRangeMax: max_score,
-				tooltipFormatter: function(sparkline, options, fields) {
-					// score_history contains the Nth _position_, but format_tooltip
-					// wants to format the Nth _move_; thus the -1.
-					return format_tooltip(data, fields[0].offset + first_move_num - 1);
+			if (max_score - min_score < 100) {
+				if (Math.abs(max_score) >= Math.abs(min_score)) {
+					max_score = min_score + 100;
+				} else {
+					min_score = max_score - 100;
 				}
-			});
-			$('#scorespark').bind('sparklineClick', function(event) {
-				var sparkline = event.sparklines[0];
-				var region = sparkline.getCurrentRegionFields();
-				if (region[0].offset !== undefined) {
-					show_line(0, first_move_num + region[0].offset - 1);
+			}
+
+			const h = scorespark.getBoundingClientRect().height;
+
+			let base_y = h - h * min_score / (min_score - max_score);
+			for (let i = 0; i < scores.length; ++i) {
+				let rect = document.createElementNS('http://www.w3.org/2000/svg', 'rect');
+				//rect.setAttributeNS(null, 'stroke', "#000000");
+				rect.setAttributeNS(null, 'x', i * 5)
+				rect.setAttributeNS(null, 'width', 4);
+				let extent = scores[i] * h / (max_score - min_score);
+				if (extent > 0 && extent < 1) {
+					extent = 1;
+				} else if (extent < 0 && extent > -1) {
+					extent = -1;
 				}
-			});
-		} else {
-			$("#scorespark").text("");
+
+				let color;
+				if (scores[i] === 0) {
+					color = [0.5, 0.5, 0.5];
+					rect.setAttributeNS(null, 'y', base_y);
+					rect.setAttributeNS(null, 'height', 1);
+				} else if (scores[i] > 0) {
+					color = [0.2, 0.4, 0.8];
+					rect.setAttributeNS(null, 'y', base_y - extent);
+					rect.setAttributeNS(null, 'height', extent + 1);
+				} else {
+					color = [1.0, 0.267, 0.267];
+					rect.setAttributeNS(null, 'y', base_y);
+					rect.setAttributeNS(null, 'height', -extent + 1);
+				}
+				let hlcolor = [color[0], color[1], color[2]];
+				if (scores[i] !== 0) { 
+					hlcolor[0] = Math.min(hlcolor[0] * 1.4, 1.0);
+					hlcolor[1] = Math.min(hlcolor[1] * 1.4, 1.0);
+					hlcolor[2] = Math.min(hlcolor[2] * 1.4, 1.0);
+				}
+				rect.style.fill = 'rgb(' + color[0]*100.0 + '%, ' + color[1]*100.0 + '%, ' + color[2]*100.0 + '%)';
+
+				// score_history contains the Nth _position_, but format_tooltip
+				// wants to format the Nth _move_; thus the -1.
+				const tooltip = format_tooltip(data, i + first_move_num - 1);
+				rect.addEventListener('mouseenter', (e) => draw_hover(e, hlcolor, tooltip));
+				rect.addEventListener('mousemove', (e) => draw_hover(e, hlcolor, tooltip));
+				rect.addEventListener('mouseleave', (e) => hide_hover(e, color));
+				rect.addEventListener('click', (e) => { hide_hover(e, color); show_line(0, i + first_move_num - 1) });
+				scorespark.appendChild(rect);
+			}
 		}
-	} else {
-		$("#scorespark").text("");
 	}
 }
 
+function draw_hover(e, color, tooltip) {
+	e.target.style.fill = 'rgb(' + color[0]*100.0 + '%, ' + color[1]*100.0 + '%, ' + color[2]*100.0 + '%)';
+
+	let hover = document.getElementById('sparklinehover');
+	hover.textContent = tooltip;
+	hover.style.display = 'initial';
+
+	let left = Math.max(e.pageX + 10, window.pageXOffset);
+	let top = Math.max(e.pageY - hover.getBoundingClientRect().height, window.pageYOffset);
+	left = Math.min(left, window.pageXOffset + document.documentElement.clientWidth - hover.getBoundingClientRect().width);
+
+	hover.style.left = left + 'px';
+	hover.style.top = top + 'px';
+
+}
+function hide_hover(e, color) {
+	e.target.style.fill = 'rgb(' + color[0]*100.0 + '%, ' + color[1]*100.0 + '%, ' + color[2]*100.0 + '%)';
+	document.getElementById('sparklinehover').style.display = 'none';
+}
+
 /**
  * @param {number} num_viewers
  */
-var update_num_viewers = function(num_viewers) {
+function update_num_viewers(num_viewers) {
+	let text = "";
 	if (num_viewers === null) {
-		$("#numviewers").text("");
+		text = "";
 	} else if (num_viewers == 1) {
-		$("#numviewers").text("You are the only current viewer");
+		text = "You are the only current viewer";
 	} else {
-		$("#numviewers").text(num_viewers + " current viewers");
+		text = num_viewers + " current viewers";
 	}
+	if (display_fen !== null) {
+		let counter = Math.floor(display_fen.split(" ")[4] / 2);
+		if (counter >= 20) {
+			text = text.replace("current ", "");
+			text += " | 50-move rule: " + counter;
+		}
+	}
+	document.getElementById("numviewers").textContent = text;
 }
 
-var update_clock = function() {
-	clearTimeout(clock_timer);
+function update_clock() {
+	clock_timer = null;
 
-	var data = displayed_analysis_data || current_analysis_data;
+	let data = displayed_analysis_data || current_analysis_data;
 	if (!data) return;
 
 	if (data['position']) {
-		var result = data['position']['result'];
+		let result = data['position']['result'];
 		if (result === '1-0') {
-			$("#whiteclock").text("1");
-			$("#blackclock").text("0");
-			$("#whiteclock").removeClass("running-clock");
-			$("#blackclock").removeClass("running-clock");
+			document.getElementById("whiteclock").textContent = "1";
+			document.getElementById("blackclock").textContent = "0";
+			document.getElementById("whiteclock").classList.remove("running-clock");
+			document.getElementById("blackclock").classList.remove("running-clock");
 			return;
 		}
 		if (result === '1/2-1/2') {
-			$("#whiteclock").text("1/2");
-			$("#blackclock").text("1/2");
-			$("#whiteclock").removeClass("running-clock");
-			$("#blackclock").removeClass("running-clock");
+			document.getElementById("whiteclock").textContent = "1/2";
+			document.getElementById("blackclock").textContent = "1/2";
+			document.getElementById("whiteclock").classList.remove("running-clock");
+			document.getElementById("blackclock").classList.remove("running-clock");
 			return;
 		}	
 		if (result === '0-1') {
-			$("#whiteclock").text("0");
-			$("#blackclock").text("1");
-			$("#whiteclock").removeClass("running-clock");
-			$("#blackclock").removeClass("running-clock");
+			document.getElementById("whiteclock").textContent = "0";
+			document.getElementById("blackclock").textContent = "1";
+			document.getElementById("whiteclock").classList.remove("running-clock");
+			document.getElementById("blackclock").classList.remove("running-clock");
 			return;
 		}
 	}
 
-	var white_clock_ms = null;
-	var black_clock_ms = null;
+	let white_clock_ms = null;
+	let black_clock_ms = null;
 
 	// Static clocks.
 	if (data['position'] &&
@@ -1421,22 +1595,22 @@ var update_clock = function() {
 	}
 
 	// Dynamic clock (only one, obviously).
-	var color;
+	let color;
 	if (data['position']['white_clock_target']) {
 		color = "white";
-		$("#whiteclock").addClass("running-clock");
-		$("#blackclock").removeClass("running-clock");
+		document.getElementById("whiteclock").classList.add("running-clock");
+		document.getElementById("blackclock").classList.remove("running-clock");
 	} else if (data['position']['black_clock_target']) {
 		color = "black";
-		$("#whiteclock").removeClass("running-clock");
-		$("#blackclock").addClass("running-clock");
+		document.getElementById("whiteclock").classList.remove("running-clock");
+		document.getElementById("blackclock").classList.add("running-clock");
 	} else {
-		$("#whiteclock").removeClass("running-clock");
-		$("#blackclock").removeClass("running-clock");
+		document.getElementById("whiteclock").classList.remove("running-clock");
+		document.getElementById("blackclock").classList.remove("running-clock");
 	}
-	var remaining_ms;
+	let remaining_ms;
 	if (color) {
-		var now = new Date().getTime() + client_clock_offset_ms;
+		let now = new Date().getTime() + client_clock_offset_ms;
 		remaining_ms = data['position'][color + '_clock_target'] * 1000 - now;
 		if (color === "white") {
 			white_clock_ms = remaining_ms;
@@ -1446,18 +1620,18 @@ var update_clock = function() {
 	}
 
 	if (white_clock_ms === null || black_clock_ms === null) {
-		$("#whiteclock").empty();
-		$("#blackclock").empty();
+		document.getElementById("whiteclock").replaceChildren();
+		document.getElementById("blackclock").replaceChildren();
 		return;
 	}
 
 	// If either player has twenty minutes or less left, add the second counters.
 	// This matches what DGT clocks do.
-	var show_seconds = (white_clock_ms < 60 * 20 * 1000 || black_clock_ms < 60 * 20 * 1000);
+	let show_seconds = (white_clock_ms < 60 * 20 * 1000 || black_clock_ms < 60 * 20 * 1000);
 
-	if (color) {
+	if (color && remaining_ms > 0) {
 		// See when the clock will change next, and update right after that.
-		var next_update_ms;
+		let next_update_ms;
 		if (show_seconds) {
 			next_update_ms = remaining_ms % 1000 + 100;
 		} else {
@@ -1466,15 +1640,15 @@ var update_clock = function() {
 		clock_timer = setTimeout(update_clock, next_update_ms);
 	}
 
-	$("#whiteclock").text(format_clock(white_clock_ms, show_seconds));
-	$("#blackclock").text(format_clock(black_clock_ms, show_seconds));
+	document.getElementById("whiteclock").textContent = format_clock(white_clock_ms, show_seconds);
+	document.getElementById("blackclock").textContent = format_clock(black_clock_ms, show_seconds);
 }
 
 /**
- * @param {Number} remaining_ms
+ * @param {number} remaining_ms
  * @param {boolean} show_seconds
  */
-var format_clock = function(remaining_ms, show_seconds) {
+function format_clock(remaining_ms, show_seconds) {
 	if (remaining_ms <= 0) {
 		if (show_seconds) {
 			return "00:00:00";
@@ -1483,12 +1657,12 @@ var format_clock = function(remaining_ms, show_seconds) {
 		}
 	}
 
-	var remaining = Math.floor(remaining_ms / 1000);
-	var seconds = remaining % 60;
+	let remaining = Math.floor(remaining_ms / 1000);
+	let seconds = remaining % 60;
 	remaining = (remaining - seconds) / 60;
-	var minutes = remaining % 60;
+	let minutes = remaining % 60;
 	remaining = (remaining - minutes) / 60;
-	var hours = remaining;
+	let hours = remaining;
 	if (show_seconds) {
 		return format_2d(hours) + ":" + format_2d(minutes) + ":" + format_2d(seconds);
 	} else {
@@ -1497,9 +1671,9 @@ var format_clock = function(remaining_ms, show_seconds) {
 }
 
 /**
- * @param {Number} x
+ * @param {number} x
  */
-var format_2d = function(x) {
+function format_2d(x) {
 	if (x >= 10) {
 		return x;
 	} else {
@@ -1509,11 +1683,11 @@ var format_2d = function(x) {
 
 /**
  * @param {string} move
- * @param {Number} move_num Move number of this move.
+ * @param {number} move_num Move number of this move.
  * @param {boolean} white_to_play Whether white is to play this move.
  */
-var format_move_with_number = function(move, move_num, white_to_play) {
-	var ret;
+function format_move_with_number(move, move_num, white_to_play) {
+	let ret;
 	if (white_to_play) {
 		ret = move_num + '. ';
 	} else {
@@ -1525,10 +1699,10 @@ var format_move_with_number = function(move, move_num, white_to_play) {
 
 /**
  * @param {string} move
- * @param {Number} halfmove_num Half-move number that is to be played,
+ * @param {number} halfmove_num Half-move number that is to be played,
  *   starting from 0.
  */
-var format_halfmove_with_number = function(move, halfmove_num) {
+function format_halfmove_with_number(move, halfmove_num) {
 	return format_move_with_number(
 		move,
 		Math.floor(halfmove_num / 2) + 1,
@@ -1537,15 +1711,15 @@ var format_halfmove_with_number = function(move, halfmove_num) {
 
 /**
  * @param {Object} data
- * @param {Number} halfmove_num
+ * @param {number} halfmove_num
  */
-var format_tooltip = function(data, halfmove_num) {
+function format_tooltip(data, halfmove_num) {
 	if (data['score_history'][halfmove_num + 1] ||
 	    (halfmove_num + 1) === data['position']['history'].length) {
 		// Position is in the history, or it is the current position
 		// (which is implicitly tacked onto the history).
-		var move;
-		var short_score;
+		let move;
+		let short_score;
 		if ((halfmove_num + 1) === data['position']['history'].length) {
 			move = data['position']['last_move'];
 			short_score = format_short_score(data['score']);
@@ -1556,13 +1730,13 @@ var format_tooltip = function(data, halfmove_num) {
 		if (halfmove_num === -1) {
 			return "Start position: " + short_score;
 		} else {
-			var move_with_number = format_halfmove_with_number(move, halfmove_num);
+			let move_with_number = format_halfmove_with_number(move, halfmove_num);
 			return "After " + move_with_number + ": " + short_score;
 		}
 	} else {
-		for (var i = halfmove_num; i --> -1; ) {
+		for (let i = halfmove_num; i --> -1; ) {
 			if (data['score_history'][i]) {
-				var move = data['position']['history'][i];
+				let move = data['position']['history'][i];
 				if (i === -1) {
 					return "[Analysis kept from start position]";
 				} else {
@@ -1573,20 +1747,11 @@ var format_tooltip = function(data, halfmove_num) {
 	}
 }
 
-/**
- * @param {boolean} truncate_history
- */
-var set_truncate_history = function(truncate_history) {
-	truncate_display_history = truncate_history;
-	update_refutation_lines();
-}
-window['set_truncate_history'] = set_truncate_history;
-
 /**
  * @param {number} line_num
  * @param {number} move_num
  */
-var show_line = function(line_num, move_num) {
+function show_line(line_num, move_num) {
 	if (line_num == -1) {
 		current_display_line = null;
 		current_display_move = null;
@@ -1599,8 +1764,8 @@ var show_line = function(line_num, move_num) {
 		update_board();
 		return;
 	} else {
-		current_display_line = jQuery.extend({}, display_lines[line_num]);  // Shallow clone.
-		current_display_move = move_num + current_display_line.start_display_move_num;
+		current_display_line = {...display_lines[line_num]};  // Shallow clone.
+		current_display_move = move_num;
 	}
 	current_display_line_is_history = (line_num == 0);
 
@@ -1612,7 +1777,7 @@ var show_line = function(line_num, move_num) {
 }
 window['show_line'] = show_line;
 
-var prev_move = function() {
+function prev_move() {
 	if (current_display_line &&
 	    current_display_move >= current_display_line.start_display_move_num) {
 		--current_display_move;
@@ -1623,7 +1788,7 @@ var prev_move = function() {
 }
 window['prev_move'] = prev_move;
 
-var next_move = function() {
+function next_move() {
 	if (current_display_line &&
 	    current_display_move < current_display_line.pv.length - 1) {
 		++current_display_move;
@@ -1634,16 +1799,16 @@ var next_move = function() {
 }
 window['next_move'] = next_move;
 
-var next_game = function() {
+function next_game() {
 	if (current_games === null) {
 		return;
 	}
 
 	// Try to find the game we are currently looking at.
-	for (var game_num = 0; game_num < current_games.length; ++game_num) {
-		var game = current_games[game_num];
+	for (let game_num = 0; game_num < current_games.length; ++game_num) {
+		let game = current_games[game_num];
 		if (game['url'] === backend_url) {
-			var next_game_num = (game_num + 1) % current_games.length;
+			let next_game_num = (game_num + 1) % current_games.length;
 			switch_backend(current_games[next_game_num]);
 			return;
 		}
@@ -1652,7 +1817,7 @@ var next_game = function() {
 	// Couldn't find it; give up.
 }
 
-var update_historic_analysis = function() {
+function update_historic_analysis() {
 	if (!current_display_line_is_history) {
 		return;
 	}
@@ -1662,85 +1827,115 @@ var update_historic_analysis = function() {
 	}
 
 	// Fetch old analysis for this line if it exists.
-	var hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
-	var filename = "/history/move" + (current_display_move + 1) + "-" +
+	let hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
+	let filename = "/history/move" + (current_display_move + 1) + "-" +
 		hiddenboard.fen().replace(/ /g, '_').replace(/\//g, '-') + ".json";
 
-	current_historic_xhr = $.ajax({
-		url: filename
-	}).done(function(data, textstatus, xhr) {
-		displayed_analysis_data = data;
+	let handle_err = () => {
+		displayed_analysis_data = {'failed': true};
 		update_board();
-	}).fail(function(jqXHR, textStatus, errorThrown) {
-		if (textStatus === "abort") {
-			// Aborted because we are switching backends. Don't do anything;
-			// we will already have been cleared.
-		} else {
-			displayed_analysis_data = {'failed': true};
+	};
+
+	current_historic_xhr = new AbortController();
+	const signal = current_analysis_xhr.signal;
+	fetch(filename, { signal })
+		.then((response) => response.json().then(data => ({ok: response.ok, json: data})))  // ick
+		.then((obj) => {
+			if (!obj.ok) {
+				handle_err();
+				return;
+			}
+			displayed_analysis_data = obj.json;
 			update_board();
-		}
-	});
+		})
+		.catch((err) => {
+			if (err.name === 'AbortError') {
+				// Aborted because we are switching backends. Abandon and don't retry,
+				// because another one is already started for us.
+			} else {
+				console.log(err);
+				handle_err();
+			}
+		});
 }
 
 /**
  * @param {string} fen
  */
-var update_imbalance = function(fen) {
-	var hiddenboard = new Chess(fen);
-	var imbalance = {'k': 0, 'q': 0, 'r': 0, 'b': 0, 'n': 0, 'p': 0};
-	for (var row = 0; row < 8; ++row) {
-		for (var col = 0; col < 8; ++col) {
-			var col_text = String.fromCharCode('a1'.charCodeAt(0) + col);
-			var row_text = String.fromCharCode('a1'.charCodeAt(1) + row);
-			var square = col_text + row_text;
-			var contents = hiddenboard.get(square);
-			if (contents !== null) {
-				if (contents.color === 'w') {
-					++imbalance[contents.type];
-				} else {
-					--imbalance[contents.type];
-				}
-			}
+function update_imbalance(fen) {
+	let imbalance = {'k': 0, 'q': 0, 'r': 0, 'b': 0, 'n': 0, 'p': 0};
+	for (const c of fen) {
+		if (c === ' ') {
+			// End of board
+			break;
+		}
+		if (c != c.toUpperCase()) {
+			--imbalance[c];
+		} else if (c != c.toLowerCase()) {
+			++imbalance[c.toLowerCase()];
+		}
+	}
+
+	let white_imbalance = document.getElementById('whiteimbalance');
+	let black_imbalance = document.getElementById('blackimbalance');
+	white_imbalance.textContent = '';
+	black_imbalance.textContent = '';
+	for (let piece in imbalance) {
+		for (let i = 0; i < imbalance[piece]; ++i) {
+			let i1 = document.createElement('img');
+			i1.src = svg_pieces['w' + piece.toUpperCase()];
+			i1.setAttribute('alt', piece.toUpperCase());
+			i1.classList.add('imbalance-piece');
+			white_imbalance.appendChild(i1);
+
+			let i2 = document.createElement('img');
+			i2.src = svg_pieces['b' + piece.toUpperCase()];
+			i2.setAttribute('alt', piece.toUpperCase());
+			i2.classList.add('imbalance-inverted-piece');
+			white_imbalance.appendChild(i2);
+		}
+		for (let i = 0; i < -imbalance[piece]; ++i) {
+			let i1 = document.createElement('img');
+			i1.src = svg_pieces['b' + piece.toUpperCase()];
+			i1.setAttribute('alt', piece.toUpperCase());
+			i1.classList.add('imbalance-piece');
+			black_imbalance.appendChild(i1);
+
+			let i2 = document.createElement('img');
+			i2.src = svg_pieces['w' + piece.toUpperCase()];
+			i2.setAttribute('alt', piece.toUpperCase());
+			i2.classList.add('imbalance-inverted-piece');
+			black_imbalance.appendChild(i2);
 		}
 	}
-	var white_imbalance = '';
-	var black_imbalance = '';
-	for (var piece in imbalance) {
-		for (var i = 0; i < imbalance[piece]; ++i) {
-			white_imbalance += '<img src="img/chesspieces/wikipedia/w' + piece.toUpperCase() + '.png" alt="" style="width: 15px;height: 15px;">';
-		}
-		for (var i = 0; i < -imbalance[piece]; ++i) {
-			black_imbalance += '<img src="img/chesspieces/wikipedia/b' + piece.toUpperCase() + '.png" alt="" style="width: 15px;height: 15px;">';
-		}
-	}
-	$('#whiteimbalance').html(white_imbalance);
-	$('#blackimbalance').html(black_imbalance);
 }
 
 /** Mark the currently selected move in red.
  * Also replaces the PV with the current displayed line if it's not shown
  * anywhere else on the screen.
  */
-var update_move_highlight = function() {
+function update_move_highlight() {
 	if (highlighted_move !== null) {
-		highlighted_move.removeClass('highlight'); 
+		highlighted_move.classList.remove('highlight'); 
 	}
 	if (current_display_line) {
-		var display_line_num = find_display_line_matching_num();
+		let display_line_num = find_display_line_matching_num();
 		if (display_line_num === null) {
 			// Replace the PV with the (complete) line.
-			$("#pvtitle").text("Exploring:");
+			document.getElementById("pvtitle").textContent = "Exploring:";
 			current_display_line.start_display_move_num = 0;
 			display_lines.push(current_display_line);
-			$("#pv").html(print_pv(display_lines.length - 1));
+			document.getElementById("pv").replaceChildren(print_pv(display_lines.length - 1, null));  // FIXME
 			display_line_num = display_lines.length - 1;
 
 			// Clear out the PV, so it's not selected by anything later.
 			display_lines[1].pv = [];
 		}
 
-		highlighted_move = $("#automove" + display_line_num + "-" + (current_display_move - current_display_line.start_display_move_num));
-		highlighted_move.addClass('highlight');
+		highlighted_move = document.getElementById("automove" + display_line_num + "-" + current_display_move);
+		if (highlighted_move !== null) {
+			highlighted_move.classList.add('highlight');
+		}
 	}
 }
 
@@ -1751,14 +1946,14 @@ var update_move_highlight = function() {
  *
  * @return {?number}
  */
-var find_display_line_matching_num = function() {
-	for (var i = 0; i < display_lines.length; ++i) {
-		var line = display_lines[i];
+function find_display_line_matching_num() {
+	for (let i = 0; i < display_lines.length; ++i) {
+		let line = display_lines[i];
 		if (line.start_display_move_num > 0) continue;
 		if (current_display_line.start_fen !== line.start_fen) continue;
 		if (current_display_line.pv.length !== line.pv.length) continue;
-		var ok = true;
-		for (var j = 0; j < line.pv.length; ++j) {
+		let ok = true;
+		for (let j = 0; j < line.pv.length; ++j) {
 			if (current_display_line.pv[j] !== line.pv[j]) {
 				ok = false;
 				break;
@@ -1776,31 +1971,31 @@ var find_display_line_matching_num = function() {
  * TODO: This should really be called only whenever something changes,
  * instead of all the time.
  */
-var update_displayed_line = function() {
+function update_displayed_line() {
 	if (current_display_line === null) {
-		$("#linenav").hide();
-		$("#linemsg").show();
+		document.getElementById("linenav").style.display = 'none';
+		document.getElementById("linemsg").style.display = 'revert';
 		display_fen = base_fen;
 		set_board_position(base_fen);
 		update_imbalance(base_fen);
 		return;
 	}
 
-	$("#linenav").show();
-	$("#linemsg").hide();
+	document.getElementById("linenav").style.display = 'revert';
+	document.getElementById("linemsg").style.display = 'none';
 
 	if (current_display_move <= 0) {
-		$("#prevmove").html("Previous");
+		document.getElementById("prevmove").textContent = "Previous";
 	} else {
-		$("#prevmove").html("<a href=\"javascript:prev_move();\">Previous</a></span>");
+		document.getElementById("prevmove").innerHTML = "<a href=\"javascript:prev_move();\">Previous</a></span>";
 	}
 	if (current_display_move == current_display_line.pv.length - 1) {
-		$("#nextmove").html("Next");
+		document.getElementById("nextmove").textContent = "Next";
 	} else {
-		$("#nextmove").html("<a href=\"javascript:next_move();\">Next</a></span>");
+		document.getElementById("nextmove").innerHTML = "<a href=\"javascript:next_move();\">Next</a></span>";
 	}
 
-	var hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
+	let hiddenboard = chess_from(current_display_line.start_fen, current_display_line.pv, current_display_move);
 	set_board_position(hiddenboard.fen());
 	if (display_fen !== hiddenboard.fen() && !current_display_line_is_history) {
 		// Fire off a hash request, since we're now off the main position
@@ -1811,10 +2006,11 @@ var update_displayed_line = function() {
 	update_imbalance(hiddenboard.fen());
 }
 
-var set_board_position = function(new_fen) {
+function set_board_position(new_fen) {
 	board_is_animating = true;
-	var old_fen = board.fen();
-	board.position(new_fen);
+	let old_fen = board.fen();
+	let animate = old_fen !== '8/8/8/8/8/8/8/';
+	board.position(new_fen, animate);
 	if (board.fen() === old_fen) {
 		board_is_animating = false;
 	}
@@ -1823,25 +2019,25 @@ var set_board_position = function(new_fen) {
 /**
  * @param {boolean} param_enable_sound
  */
-var set_sound = function(param_enable_sound) {
+function set_sound(param_enable_sound) {
 	enable_sound = param_enable_sound;
 	if (enable_sound) {
-		$("#soundon").html("<strong>On</strong>");
-		$("#soundoff").html("<a href=\"javascript:set_sound(false)\">Off</a>");
+		document.getElementById("soundon").innerHTML = "<strong>On</strong>";
+		document.getElementById("soundoff").innerHTML = "<a href=\"javascript:set_sound(false)\">Off</a>";
 
 		// Seemingly at least Firefox prefers MP3 over Opus; tell it otherwise,
 		// and also preload the file since the user has selected audio.
-		var ding = document.getElementById('ding');
+		let ding = document.getElementById('ding');
 		if (ding && ding.canPlayType && ding.canPlayType('audio/ogg; codecs="opus"') === 'probably') {
 			ding.src = 'ding.opus';
 			ding.load();
 		}
 	} else {
-		$("#soundon").html("<a href=\"javascript:set_sound(true)\">On</a>");
-		$("#soundoff").html("<strong>Off</strong>");
+		document.getElementById("soundon").innerHTML = "<a href=\"javascript:set_sound(true)\">On</a>";
+		document.getElementById("soundoff").innerHTML = "<strong>Off</strong>";
 	}
 	if (supports_html5_storage()) {
-		localStorage['enable_sound'] = enable_sound ? 1 : 0;
+		window['localStorage']['enable_sound'] = enable_sound ? 1 : 0;
 	}
 }
 window['set_sound'] = set_sound;
@@ -1849,7 +2045,7 @@ window['set_sound'] = set_sound;
 /** Send off a hash probe request to the backend.
  * @param {string} fen
  */
-var explore_hash = function(fen) {
+function explore_hash(fen) {
 	// If we already have a backend response going, abort it.
 	if (current_hash_xhr) {
 		current_hash_xhr.abort();
@@ -1858,19 +2054,25 @@ var explore_hash = function(fen) {
 		clearTimeout(current_hash_display_timer);
 		current_hash_display_timer = null;
 	}
-	$("#refutationlines").empty();
-	current_hash_xhr = $.ajax({
-		url: backend_hash_url + "?fen=" + fen
-	}).done(function(data, textstatus, xhr) {
-		show_explore_hash_results(data, fen);
-	});
+	document.getElementById("refutationlines").replaceChildren();
+
+	current_hash_xhr = new AbortController();
+	const signal = current_analysis_xhr.signal;
+	fetch(backend_hash_url + "?fen=" + fen, { signal })
+		.then((response) => response.json())
+		.then((data) => { show_explore_hash_results(data, fen); })
+		.catch((err) => {
+			// Truncate the lines, since we already cleared the display.
+			display_lines = [ display_lines[0], display_lines[1] ];
+			update_move_highlight();
+		});
 }
 
 /** Process the JSON response from a hash probe request.
  * @param {!Object} data
  * @param {string} fen
  */
-var show_explore_hash_results = function(data, fen) {
+function show_explore_hash_results(data, fen) {
 	if (board_is_animating) {
 		// Updating while the animation is still going causes
 		// the animation to jerk. This is pretty crude, but it will do.
@@ -1879,12 +2081,13 @@ var show_explore_hash_results = function(data, fen) {
 	}
 	current_hash_display_timer = null;
 	hash_refutation_lines = data['lines'];
+	hash_refutation_lines_base_fen = fen;
 	update_board();
 }
 
 // almost all of this stuff comes from the chessboard.js example page
-var onDragStart = function(source, piece, position, orientation) {
-	var pseudogame = new Chess(display_fen);
+function onDragStart(source, piece, position, orientation) {
+	let pseudogame = new Chess(display_fen);
 	if (pseudogame.game_over() === true ||
 	    (pseudogame.turn() === 'w' && piece.search(/^b/) !== -1) ||
 	    (pseudogame.turn() === 'b' && piece.search(/^w/) !== -1)) {
@@ -1893,53 +2096,62 @@ var onDragStart = function(source, piece, position, orientation) {
 
 	recommended_move = get_best_move(pseudogame, source, null, pseudogame.turn() === 'b');
 	if (recommended_move) {
-		var squareEl = $('#board .square-' + recommended_move.to);
-		squareEl.addClass('highlight1-32417');
+		let squareEl = document.querySelector('#board .square-' + recommended_move.to);
+		squareEl.classList.add('highlight1-32417');
 	}
 	return true;
 }
 
-var mousedownSquare = function(e) {
+function mousedownSquare(e) {
+	if (!e.target || !e.target.getAttribute('data-square')) {
+		return;
+	}
+
 	reverse_dragging_from = null;
-	var square = $(this).attr('data-square');
+	let square = e.target.getAttribute('data-square');
 
-	var pseudogame = new Chess(display_fen);
+	let pseudogame = new Chess(display_fen);
 	if (pseudogame.game_over() === true) {
 		return;
 	}
 
 	// If the square is empty, or has a piece of the side not to move,
 	// we handle it. If not, normal piece dragging will take it.
-	var position = board.position();
+	let position = board.position();
 	if (!position.hasOwnProperty(square) ||
 	    (pseudogame.turn() === 'w' && position[square].search(/^b/) !== -1) ||
 	    (pseudogame.turn() === 'b' && position[square].search(/^w/) !== -1)) {
 		reverse_dragging_from = square;
 		recommended_move = get_best_move(pseudogame, null, square, pseudogame.turn() === 'b');
 		if (recommended_move) {
-			var squareEl = $('#board .square-' + recommended_move.from);
-			squareEl.addClass('highlight1-32417');
-			squareEl = $('#board .square-' + recommended_move.to);
-			squareEl.addClass('highlight1-32417');
+			let squareEl = document.querySelector('#board .square-' + recommended_move.from);
+			squareEl.classList.add('highlight1-32417');
+			squareEl = document.querySelector('#board .square-' + recommended_move.to);
+			squareEl.classList.add('highlight1-32417');
 		}
 	}
 }
 
-var mouseupSquare = function(e) {
+function mouseupSquare(e) {
+	if (!e.target || !e.target.getAttribute('data-square')) {
+		return;
+	}
 	if (reverse_dragging_from === null) {
 		return;
 	}
-	var source = $(this).attr('data-square');
-	var target = reverse_dragging_from;
+	let source = e.target.getAttribute('data-square');
+	let target = reverse_dragging_from;
 	reverse_dragging_from = null;
 	if (onDrop(source, target) !== 'snapback') {
 		onSnapEnd(source, target);
 	}
-	$("#board").find('.square-55d63').removeClass('highlight1-32417');
+	document.getElementById("board").querySelectorAll('.square-55d63.highlight1-32417').forEach((square) => {
+		square.classList.remove('highlight1-32417');
+	});
 }
 
-var get_best_move = function(game, source, target, invert) {
-	var moves = game.moves({ verbose: true });
+function get_best_move(game, source, target, invert) {
+	let moves = game.moves({ verbose: true });
 	if (source !== null) {
 		moves = moves.filter(function(move) { return move.from == source; });
 	}
@@ -1955,40 +2167,41 @@ var get_best_move = function(game, source, target, invert) {
 
 	// More than one move. Use the display lines (if we have them)
 	// to disambiguate; otherwise, we have no information.
-	var move_hash = {};
-	for (var i = 0; i < moves.length; ++i) {
+	let move_hash = {};
+	for (let i = 0; i < moves.length; ++i) {
 		move_hash[moves[i].san] = moves[i];
 	}
 
 	// See if we're already exploring some line.
 	if (current_display_line &&
 	    current_display_move < current_display_line.pv.length - 1) {
-		var first_move = current_display_line.pv[current_display_move + 1];
+		let first_move = current_display_line.pv[current_display_move + 1];
 		if (move_hash[first_move]) {
 			return move_hash[first_move];
 		}
 	}
 
 	// History and PV take priority over the display lines.
-	for (var i = 0; i < 2; ++i) {
-		var line = display_lines[i];
-		var first_move = line.pv[line.start_display_move_num];
+	for (let i = 0; i < 2; ++i) {
+		let line = display_lines[i];
+		let first_move = line.pv[line.start_display_move_num];
 		if (move_hash[first_move]) {
 			return move_hash[first_move];
 		}
 	}
 
-	var best_move = null;
-	var best_move_score = null;
+	let best_move = null;
+	let best_move_score = null;
 
-	for (var move in refutation_lines) {
-		var line = refutation_lines[move];
+	let refutation_lines = choose_displayed_refutation_lines()[0];
+	for (let move in refutation_lines) {
+		let line = refutation_lines[move];
 		if (!line['score']) {
 			continue;
 		}
-		var first_move = line['pv'][0];
+		let first_move = line['pv'][0];
 		if (move_hash[first_move]) {
-			var score = compute_score_sort_key(line['score'], line['depth'], invert);
+			let score = compute_score_sort_key(line['score'], line['depth'], invert);
 			if (best_move_score === null || score > best_move_score) {
 				best_move = move_hash[first_move];
 				best_move_score = score;
@@ -1998,7 +2211,7 @@ var get_best_move = function(game, source, target, invert) {
 	return best_move;
 }
 
-var onDrop = function(source, target) {
+function onDrop(source, target) {
 	if (source === target) {
 		if (recommended_move === null) {
 			return 'snapback';
@@ -2012,8 +2225,8 @@ var onDrop = function(source, target) {
 	}
 
 	// see if the move is legal
-	var pseudogame = new Chess(display_fen);
-	var move = pseudogame.move({
+	let pseudogame = new Chess(display_fen);
+	let move = pseudogame.move({
 		from: source,
 		to: target,
 		promotion: 'q' // NOTE: always promote to a queen for example simplicity
@@ -2023,19 +2236,71 @@ var onDrop = function(source, target) {
 	if (move === null) return 'snapback';
 }
 
-var onSnapEnd = function(source, target) {
+/**
+ * If we are in admin mode, send this move to the backend.
+ *
+ * @param {string} fen
+ * @param {string} move
+ */
+function send_chosen_move(fen, move) {
+	if (admin_password !== null) {
+		let history = current_analysis_data['position']['history'];
+		let url = '/manual-override.pl';
+		url += '?fen=' + encodeURIComponent(fen);
+		url += '&history=' + encodeURIComponent(JSON.stringify(history));
+		url += '&move=' + encodeURIComponent(move);
+		url += '&player_w=' + encodeURIComponent(current_analysis_data['position']['player_w']);
+		url += '&player_b=' + encodeURIComponent(current_analysis_data['position']['player_b']);
+		url += '&password=' + encodeURIComponent(admin_password);
+
+		console.log(fen, history);
+		fetch(url);  // Ignore the result.
+	}
+}
+
+function undo_move() {
+	if (admin_password !== null) {
+		let history = current_analysis_data['position']['history'];
+		history = history.slice(0, history.length - 1);
+
+		let position = current_analysis_data['position']['start_fen'];
+		let hiddenboard = chess_from(position, history, history.length);
+		let fen = hiddenboard.fen();
+
+		let url = '/manual-override.pl';
+		url += '?fen=' + encodeURIComponent(fen);
+		url += '&history=' + encodeURIComponent(JSON.stringify(history));
+		url += '&move=null';
+		url += '&player_w=' + encodeURIComponent(current_analysis_data['position']['player_w']);
+		url += '&player_b=' + encodeURIComponent(current_analysis_data['position']['player_b']);
+		url += '&password=' + encodeURIComponent(admin_password);
+
+		console.log(fen, history);
+		fetch(url);  // Ignore the result.
+	}
+}
+window['undo_move'] = undo_move;
+
+function onSnapEnd(source, target) {
 	if (source === target && recommended_move !== null) {
 		source = recommended_move.from;
 		target = recommended_move.to;
 	}
 	recommended_move = null;
-	var pseudogame = new Chess(display_fen);
-	var move = pseudogame.move({
+	let pseudogame = new Chess(display_fen);
+	let move = pseudogame.move({
 		from: source,
 		to: target,
 		promotion: 'q' // NOTE: always promote to a queen for example simplicity
 	});
 
+	if (admin_password !== null) {
+		send_chosen_move(display_fen, move.san);
+		return;
+	}
+
+	// Move ahead on the line we're on -- this includes history if we've
+	// gone backwards.
 	if (current_display_line &&
 	    current_display_move < current_display_line.pv.length - 1 &&
 	    current_display_line.pv[current_display_move + 1] === move.san) {
@@ -2045,25 +2310,29 @@ var onSnapEnd = function(source, target) {
 
 	// Walk down the displayed lines until we find one that starts with
 	// this move, then select that. Note that this gives us a good priority
-	// order (history first, then PV, then multi-PV lines).
-	for (var i = 0; i < display_lines.length; ++i) {
+	// order (PV, then multi-PV lines; history was already dealt with above,
+	// as it's the only line that originates backwards).
+	for (let i = 1; i < display_lines.length; ++i) {
 		if (i == 1 && current_display_line) {
 			// Do not choose PV if not on it.
 			continue;
 		}
-		var line = display_lines[i];
+		let line = display_lines[i];
 		if (line.pv[line.start_display_move_num] === move.san) {
-			show_line(i, 0);
+			show_line(i, line.start_display_move_num);
 			return;
 		}
 	}
 
 	// Shouldn't really be here if we have hash probes, but there's really
 	// nothing we can do.
+	// FIXME: Just make a new line, probably (even if we don't have hash moves).
+	// As it is, we can actually drag (but not click) such a move in the UI,
+	// but it has no effect on what we're probing.
 }
 // End of dragging-related code.
 
-var fmt_cp = function(v) {
+function fmt_cp(v) {
 	if (v === 0) {
 		return "0.00";
 	} else if (v > 0) {
@@ -2074,18 +2343,29 @@ var fmt_cp = function(v) {
 	}
 }
 
-var format_short_score = function(score) {
+function format_short_score(score) {
 	if (!score) {
 		return "???";
 	}
-	if (score[0] === 'm') {
+	if (score[0] === 'T' || score[0] === 't') {
+		let ret = "TB\u00a0";
 		if (score[2]) {  // Is a bound.
-			return score[2] + "\u00a0M " + score[1];
+			ret = score[2] + "\u00a0TB\u00a0";
+		}
+		if (score[0] === 'T') {
+			return ret + Math.ceil(score[1] / 2);
 		} else {
-			return "M " + score[1];
+			return ret + "-" + Math.ceil(score[1] / 2);
+		}
+	} else if (score[0] === 'M' || score[0] === 'm') {
+		let sign = (score[0] === 'm') ? '-' : '';
+		if (score[2]) {  // Is a bound.
+			return score[2] + "\u00a0M " + sign + score[1];
+		} else {
+			return "M " + sign + score[1];
 		}
 	} else if (score[0] === 'd') {
-		return "TB draw";
+		return "TB =0";
 	} else if (score[0] === 'cp') {
 		if (score[2]) {  // Is a bound.
 			return score[2] + "\u00a0" + fmt_cp(score[1]);
@@ -2096,15 +2376,33 @@ var format_short_score = function(score) {
 	return null;
 }
 
-var format_long_score = function(score) {
+function format_long_score(score) {
 	if (!score) {
 		return "???";
 	}
-	if (score[0] === 'm') {
-		if (score[1] > 0) {
+	if (score[0] === 'T') {
+		if (score[1] == 0) {
+			return "Won for white (tablebase)";
+		} else {
+			return "White wins in " + Math.ceil(score[1] / 2);
+		}
+	} else if (score[0] === 't') {
+		if (score[1] == -1) {
+			return "Won for black (tablebase)";
+		} else {
+			return "Black wins in " + Math.ceil(score[1] / 2);
+		}
+	} else if (score[0] === 'M') {
+		if (score[1] == 0) {
+			return "White wins by checkmate";
+		} else {
 			return "White mates in " + score[1];
+		}
+	} else if (score[0] === 'm') {
+		if (score[1] == 0) {
+			return "Black wins by checkmate";
 		} else {
-			return "Black mates in " + (-score[1]);
+			return "Black mates in " + score[1];
 		}
 	} else if (score[0] === 'd') {
 		return "Theoretical draw";
@@ -2114,13 +2412,11 @@ var format_long_score = function(score) {
 	return null;
 }
 
-var compute_plot_score = function(score) {
-	if (score[0] === 'm') {
-		if (score[1] > 0) {
-			return 500;
-		} else {
-			return -500;
-		}
+function compute_plot_score(score) {
+	if (score[0] === 'M' || score[0] === 'T') {
+		return 500;
+	} else if (score[0] === 'm' || score[0] === 't') {
+		return -500;
 	} else if (score[0] === 'd') {
 		return 0;
 	} else if (score[0] === 'cp') {
@@ -2139,22 +2435,25 @@ var compute_plot_score = function(score) {
  * @param score The score digest tuple.
  * @param {?number} depth Depth the move has been computed to, or null.
  * @param {boolean} invert Whether black is to play.
- * @param {boolean=} depth_secondary_key
  * @return {number}
  */
-var compute_score_sort_key = function(score, depth, invert, depth_secondary_key) {
-	var s;
+function compute_score_sort_key(score, depth, invert) {
+	let s;
 	if (!score) {
 		return -10000000;
 	}
-	if (score[0] === 'm') {
-		if (score[1] > 0) {
-			// White mates.
-			s = 99999 - score[1];
-		} else {
-			// Black mates (note the double negative for score[1]).
-			s = -99999 - score[1];
-		}
+	if (score[0] === 'T') {
+		// White reaches TB win.
+		s = 89999 - score[1];
+	} else if (score[0] === 't') {
+		// Black reaches TB win.
+		s = -(89999 - score[1]);
+	} else if (score[0] === 'M') {
+		// White mates.
+		s = 99999 - score[1];
+	} else if (score[0] === 'm') {
+		// Black mates.
+		s = -(99999 - score[1]);
 	} else if (score[0] === 'd') {
 		s = 0;
 	} else if (score[0] === 'cp') {
@@ -2162,11 +2461,7 @@ var compute_score_sort_key = function(score, depth, invert, depth_secondary_key)
 	}
 	if (s) {
 		if (invert) s = -s;
-		if (depth_secondary_key) {
-			return s * 200 + (depth || 0);
-		} else {
-			return s;
-		}
+		return s;
 	} else {
 		return null;
 	}
@@ -2175,7 +2470,7 @@ var compute_score_sort_key = function(score, depth, invert, depth_secondary_key)
 /**
  * @param {Object} game
  */
-var switch_backend = function(game) {
+function switch_backend(game) {
 	// Stop looking at historic data.
 	current_display_line = null;
 	current_display_move = null;
@@ -2214,43 +2509,79 @@ var switch_backend = function(game) {
 window['switch_backend'] = switch_backend;
 
 window['flip'] = function() { board.flip(); redraw_arrows(); };
+window['set_delay_ms'] = function(ms) { delay_ms = ms; console.log('Delay is now ' + ms + ' ms.'); };
+
+// Mostly from Wikipedia's chess set as of October 2022, but some pieces are from
+// the 2013 version, as I like those better (and it matches the 2014 PNGs; nobody
+// really likes change, do they?). That is wK, bK, bQ. wQ is also slightly different,
+// but not enough to notice.
+const svg_pieces = {
+	'wK': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22fill:none;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22><path d=%22M 22.5,11.63 L 22.5,6%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22/><path d=%22M 20,8 L 25,8%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22/><path d=%22M 22.5,25 C 22.5,25 27,17.5 25.5,14.5 C 25.5,14.5 24.5,12 22.5,12 C 20.5,12 19.5,14.5 19.5,14.5 C 18,17.5 22.5,25 22.5,25%22 style=%22fill:%23ffffff;stroke:%23000000;stroke-linecap:butt;stroke-linejoin:miter%22/><path d=%22M 11.5,37 C 17,40.5 27,40.5 32.5,37 L 32.5,30 C 32.5,30 41.5,25.5 38.5,19.5 C 34.5,13 25,16 22.5,23.5 L 22.5,27 L 22.5,23.5 C 19,16 9.5,13 6.5,19.5 C 3.5,25.5 11.5,29.5 11.5,29.5 L 11.5,37 z %22 style=%22fill:%23ffffff;stroke:%23000000%22/><path d=%22M 11.5,30 C 17,27 27,27 32.5,30%22 style=%22fill:none;stroke:%23000000%22/><path d=%22M 11.5,33.5 C 17,30.5 27,30.5 32.5,33.5%22 style=%22fill:none;stroke:%23000000%22/><path d=%22M 11.5,37 C 17,34 27,34 32.5,37%22 style=%22fill:none;stroke:%23000000%22/></g></svg>',
+	'wQ': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22fill:%23ffffff;stroke:%23000000;stroke-width:1.5;stroke-linejoin:round%22><path d=%22M 9,26 C 17.5,24.5 30,24.5 36,26 L 38.5,13.5 L 31,25 L 30.7,10.9 L 25.5,24.5 L 22.5,10 L 19.5,24.5 L 14.3,10.9 L 14,25 L 6.5,13.5 L 9,26 z%22/><path d=%22M 9,26 C 9,28 10.5,28 11.5,30 C 12.5,31.5 12.5,31 12,33.5 C 10.5,34.5 11,36 11,36 C 9.5,37.5 11,38.5 11,38.5 C 17.5,39.5 27.5,39.5 34,38.5 C 34,38.5 35.5,37.5 34,36 C 34,36 34.5,34.5 33,33.5 C 32.5,31 32.5,31.5 33.5,30 C 34.5,28 36,28 36,26 C 27.5,24.5 17.5,24.5 9,26 z%22/><path d=%22M 11.5,30 C 15,29 30,29 33.5,30%22 style=%22fill:none%22/><path d=%22M 12,33.5 C 18,32.5 27,32.5 33,33.5%22 style=%22fill:none%22/><circle cx=%226%22 cy=%2212%22 r=%222%22/><circle cx=%2214%22 cy=%229%22 r=%222%22/><circle cx=%2222.5%22 cy=%228%22 r=%222%22/><circle cx=%2231%22 cy=%229%22 r=%222%22/><circle cx=%2239%22 cy=%2212%22 r=%222%22/></g></svg>',
+	'wR': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:%23ffffff;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.3)%22><path d=%22M 9,39 L 36,39 L 36,36 L 9,36 L 9,39 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 12,36 L 12,32 L 33,32 L 33,36 L 12,36 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 11,14 L 11,9 L 15,9 L 15,11 L 20,11 L 20,9 L 25,9 L 25,11 L 30,11 L 30,9 L 34,9 L 34,14%22 style=%22stroke-linecap:butt%22/><path d=%22M 34,14 L 31,17 L 14,17 L 11,14%22/><path d=%22M 31,17 L 31,29.5 L 14,29.5 L 14,17%22 style=%22stroke-linecap:butt;stroke-linejoin:miter%22/><path d=%22M 31,29.5 L 32.5,32 L 12.5,32 L 14,29.5%22/><path d=%22M 11,14 L 34,14%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22/></g></svg>',
+	'wB': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:none;fill-rule:evenodd;fill-opacity:1;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.6)%22><g style=%22fill:%23ffffff;stroke:%23000000;stroke-linecap:butt%22><path d=%22M 9,36 C 12.39,35.03 19.11,36.43 22.5,34 C 25.89,36.43 32.61,35.03 36,36 C 36,36 37.65,36.54 39,38 C 38.32,38.97 37.35,38.99 36,38.5 C 32.61,37.53 25.89,38.96 22.5,37.5 C 19.11,38.96 12.39,37.53 9,38.5 C 7.65,38.99 6.68,38.97 6,38 C 7.35,36.54 9,36 9,36 z%22/><path d=%22M 15,32 C 17.5,34.5 27.5,34.5 30,32 C 30.5,30.5 30,30 30,30 C 30,27.5 27.5,26 27.5,26 C 33,24.5 33.5,14.5 22.5,10.5 C 11.5,14.5 12,24.5 17.5,26 C 17.5,26 15,27.5 15,30 C 15,30 14.5,30.5 15,32 z%22/><path d=%22M 25 8 A 2.5 2.5 0 1 1 20,8 A 2.5 2.5 0 1 1 25 8 z%22/></g><path d=%22M 17.5,26 L 27.5,26 M 15,30 L 30,30 M 22.5,15.5 L 22.5,20.5 M 20,18 L 25,18%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22/></g></svg>',
+	'wN': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:none;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.3)%22><path d=%22M 22,10 C 32.5,11 38.5,18 38,39 L 15,39 C 15,30 25,32.5 23,18%22 style=%22fill:%23ffffff;stroke:%23000000%22/><path d=%22M 24,18 C 24.38,20.91 18.45,25.37 16,27 C 13,29 13.18,31.34 11,31 C 9.958,30.06 12.41,27.96 11,28 C 10,28 11.19,29.23 10,30 C 9,30 5.997,31 6,26 C 6,24 12,14 12,14 C 12,14 13.89,12.1 14,10.5 C 13.27,9.506 13.5,8.5 13.5,7.5 C 14.5,6.5 16.5,10 16.5,10 L 18.5,10 C 18.5,10 19.28,8.008 21,7 C 22,7 22,10 22,10%22 style=%22fill:%23ffffff;stroke:%23000000%22/><path d=%22M 9.5 25.5 A 0.5 0.5 0 1 1 8.5,25.5 A 0.5 0.5 0 1 1 9.5 25.5 z%22 style=%22fill:%23000000;stroke:%23000000%22/><path d=%22M 15 15.5 A 0.5 1.5 0 1 1 14,15.5 A 0.5 1.5 0 1 1 15 15.5 z%22 transform=%22matrix(0.866,0.5,-0.5,0.866,9.693,-5.173)%22 style=%22fill:%23000000;stroke:%23000000%22/></g></svg>',
+	'wP': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><path d=%22m 22.5,9 c -2.21,0 -4,1.79 -4,4 0,0.89 0.29,1.71 0.78,2.38 C 17.33,16.5 16,18.59 16,21 c 0,2.03 0.94,3.84 2.41,5.03 C 15.41,27.09 11,31.58 11,39.5 H 34 C 34,31.58 29.59,27.09 26.59,26.03 28.06,24.84 29,23.03 29,21 29,18.59 27.67,16.5 25.72,15.38 26.21,14.71 26.5,13.89 26.5,13 c 0,-2.21 -1.79,-4 -4,-4 z%22 style=%22opacity:1;fill:%23ffffff;fill-opacity:1;fill-rule:nonzero;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22/></svg>',
+       'bK': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22fill:none;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22><path d=%22M 22.5,11.63 L 22.5,6%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22 id=%22path6570%22/><path d=%22M 22.5,25 C 22.5,25 27,17.5 25.5,14.5 C 25.5,14.5 24.5,12 22.5,12 C 20.5,12 19.5,14.5 19.5,14.5 C 18,17.5 22.5,25 22.5,25%22 style=%22fill:%23000000;fill-opacity:1;stroke-linecap:butt;stroke-linejoin:miter%22/><path d=%22M 11.5,37 C 17,40.5 27,40.5 32.5,37 L 32.5,30 C 32.5,30 41.5,25.5 38.5,19.5 C 34.5,13 25,16 22.5,23.5 L 22.5,27 L 22.5,23.5 C 19,16 9.5,13 6.5,19.5 C 3.5,25.5 11.5,29.5 11.5,29.5 L 11.5,37 z %22 style=%22fill:%23000000;stroke:%23000000%22/><path d=%22M 20,8 L 25,8%22 style=%22fill:none;stroke:%23000000;stroke-linejoin:miter%22/><path d=%22M 32,29.5 C 32,29.5 40.5,25.5 38.03,19.85 C 34.15,14 25,18 22.5,24.5 L 22.51,26.6 L 22.5,24.5 C 20,18 9.906,14 6.997,19.85 C 4.5,25.5 11.85,28.85 11.85,28.85%22 style=%22fill:none;stroke:%23ffffff%22/><path d=%22M 11.5,30 C 17,27 27,27 32.5,30 M 11.5,33.5 C 17,30.5 27,30.5 32.5,33.5 M 11.5,37 C 17,34 27,34 32.5,37%22 style=%22fill:none;stroke:%23ffffff%22/></g></svg>',
+        'bQ': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns:svg=%22http://www.w3.org/2000/svg%22 xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22 id=%22svg3128%22><defs/><g id=%22layer1%22><path d=%22M 8 12 A 2 2 0 1 1 4,12 A 2 2 0 1 1 8 12 z%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;stroke:%23000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 id=%22path5571%22/><path d=%22M 9 13 A 2 2 0 1 1 5,13 A 2 2 0 1 1 9 13 z%22 transform=%22translate(15.5,-5.5)%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;stroke:%23000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 id=%22path5573%22/><path d=%22M 9 13 A 2 2 0 1 1 5,13 A 2 2 0 1 1 9 13 z%22 transform=%22translate(32,-1)%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;stroke:%23000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 id=%22path5575%22/><path d=%22M 9 13 A 2 2 0 1 1 5,13 A 2 2 0 1 1 9 13 z%22 transform=%22translate(7,-4.5)%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;stroke:%23000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 id=%22path5577%22/><path d=%22M 9 13 A 2 2 0 1 1 5,13 A 2 2 0 1 1 9 13 z%22 transform=%22translate(24,-4)%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;stroke:%23000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 id=%22path5579%22/><path d=%22M 9,26 C 17.5,24.5 30,24.5 36,26 L 38,14 L 31,25 L 31,11 L 25.5,24.5 L 22.5,9.5 L 19.5,24.5 L 14,10.5 L 14,25 L 7,14 L 9,26 z %22 style=%22fill:%23000000;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:round;stroke-opacity:1%22 id=%22path5581%22/><path d=%22M 9,26 C 9,28 10.5,28 11.5,30 C 12.5,31.5 12.5,31 12,33.5 C 10.5,34.5 10.5,36 10.5,36 C 9,37.5 11,38.5 11,38.5 C 17.5,39.5 27.5,39.5 34,38.5 C 34,38.5 35.5,37.5 34,36 C 34,36 34.5,34.5 33,33.5 C 32.5,31 32.5,31.5 33.5,30 C 34.5,28 36,28 36,26 C 27.5,24.5 17.5,24.5 9,26 z %22 style=%22fill:%23000000;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:round;stroke-opacity:1%22 id=%22path5583%22/><path d=%22M 11.5,30 C 15,29 30,29 33.5,30%22 style=%22fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:%23ffffff;stroke-width:1px;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1%22 id=%22path5585%22/><path d=%22M 12,33.5 C 18,32.5 27,32.5 33,33.5%22 style=%22fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:%23ffffff;stroke-width:1px;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1%22 id=%22path5587%22/><path d=%22M 10.5,36 C 15.5,35 29,35 34,36%22 style=%22fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:%23ffffff;stroke-width:1px;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1%22 id=%22path5589%22/></g></svg>',
+	'bR': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:%23000000;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.3)%22><path d=%22M 9,39 L 36,39 L 36,36 L 9,36 L 9,39 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 12.5,32 L 14,29.5 L 31,29.5 L 32.5,32 L 12.5,32 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 12,36 L 12,32 L 33,32 L 33,36 L 12,36 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 14,29.5 L 14,16.5 L 31,16.5 L 31,29.5 L 14,29.5 z %22 style=%22stroke-linecap:butt;stroke-linejoin:miter%22/><path d=%22M 14,16.5 L 11,14 L 34,14 L 31,16.5 L 14,16.5 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 11,14 L 11,9 L 15,9 L 15,11 L 20,11 L 20,9 L 25,9 L 25,11 L 30,11 L 30,9 L 34,9 L 34,14 L 11,14 z %22 style=%22stroke-linecap:butt%22/><path d=%22M 12,35.5 L 33,35.5 L 33,35.5%22 style=%22fill:none;stroke:%23ffffff;stroke-width:1;stroke-linejoin:miter%22/><path d=%22M 13,31.5 L 32,31.5%22 style=%22fill:none;stroke:%23ffffff;stroke-width:1;stroke-linejoin:miter%22/><path d=%22M 14,29.5 L 31,29.5%22 style=%22fill:none;stroke:%23ffffff;stroke-width:1;stroke-linejoin:miter%22/><path d=%22M 14,16.5 L 31,16.5%22 style=%22fill:none;stroke:%23ffffff;stroke-width:1;stroke-linejoin:miter%22/><path d=%22M 11,14 L 34,14%22 style=%22fill:none;stroke:%23ffffff;stroke-width:1;stroke-linejoin:miter%22/></g></svg>',
+	'bB': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:none;fill-rule:evenodd;fill-opacity:1;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.6)%22><g style=%22fill:%23000000;stroke:%23000000;stroke-linecap:butt%22><path d=%22M 9,36 C 12.39,35.03 19.11,36.43 22.5,34 C 25.89,36.43 32.61,35.03 36,36 C 36,36 37.65,36.54 39,38 C 38.32,38.97 37.35,38.99 36,38.5 C 32.61,37.53 25.89,38.96 22.5,37.5 C 19.11,38.96 12.39,37.53 9,38.5 C 7.65,38.99 6.68,38.97 6,38 C 7.35,36.54 9,36 9,36 z%22/><path d=%22M 15,32 C 17.5,34.5 27.5,34.5 30,32 C 30.5,30.5 30,30 30,30 C 30,27.5 27.5,26 27.5,26 C 33,24.5 33.5,14.5 22.5,10.5 C 11.5,14.5 12,24.5 17.5,26 C 17.5,26 15,27.5 15,30 C 15,30 14.5,30.5 15,32 z%22/><path d=%22M 25 8 A 2.5 2.5 0 1 1 20,8 A 2.5 2.5 0 1 1 25 8 z%22/></g><path d=%22M 17.5,26 L 27.5,26 M 15,30 L 30,30 M 22.5,15.5 L 22.5,20.5 M 20,18 L 25,18%22 style=%22fill:none;stroke:%23ffffff;stroke-linejoin:miter%22/></g></svg>',
+	'bN': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><g style=%22opacity:1;fill:none;fill-opacity:1;fill-rule:evenodd;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22 transform=%22translate(0,0.3)%22><path d=%22M 22,10 C 32.5,11 38.5,18 38,39 L 15,39 C 15,30 25,32.5 23,18%22 style=%22fill:%23000000;stroke:%23000000%22/><path d=%22M 24,18 C 24.38,20.91 18.45,25.37 16,27 C 13,29 13.18,31.34 11,31 C 9.958,30.06 12.41,27.96 11,28 C 10,28 11.19,29.23 10,30 C 9,30 5.997,31 6,26 C 6,24 12,14 12,14 C 12,14 13.89,12.1 14,10.5 C 13.27,9.506 13.5,8.5 13.5,7.5 C 14.5,6.5 16.5,10 16.5,10 L 18.5,10 C 18.5,10 19.28,8.008 21,7 C 22,7 22,10 22,10%22 style=%22fill:%23000000;stroke:%23000000%22/><path d=%22M 9.5 25.5 A 0.5 0.5 0 1 1 8.5,25.5 A 0.5 0.5 0 1 1 9.5 25.5 z%22 style=%22fill:%23ffffff;stroke:%23ffffff%22/><path d=%22M 15 15.5 A 0.5 1.5 0 1 1 14,15.5 A 0.5 1.5 0 1 1 15 15.5 z%22 transform=%22matrix(0.866,0.5,-0.5,0.866,9.693,-5.173)%22 style=%22fill:%23ffffff;stroke:%23ffffff%22/><path d=%22M 24.55,10.4 L 24.1,11.85 L 24.6,12 C 27.75,13 30.25,14.49 32.5,18.75 C 34.75,23.01 35.75,29.06 35.25,39 L 35.2,39.5 L 37.45,39.5 L 37.5,39 C 38,28.94 36.62,22.15 34.25,17.66 C 31.88,13.17 28.46,11.02 25.06,10.5 L 24.55,10.4 z %22 style=%22fill:%23ffffff;stroke:none%22/></g></svg>',
+	'bP': 'data:image/svg+xml,<?xml version=%221.0%22 encoding=%22UTF-8%22 standalone=%22no%22?>%0A<!DOCTYPE svg PUBLIC %22-//W3C//DTD SVG 1.1//EN%22 %22http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd%22>%0A<svg xmlns=%22http://www.w3.org/2000/svg%22 version=%221.1%22 width=%2245%22 height=%2245%22><path d=%22m 22.5,9 c -2.21,0 -4,1.79 -4,4 0,0.89 0.29,1.71 0.78,2.38 C 17.33,16.5 16,18.59 16,21 c 0,2.03 0.94,3.84 2.41,5.03 C 15.41,27.09 11,31.58 11,39.5 H 34 C 34,31.58 29.59,27.09 26.59,26.03 28.06,24.84 29,23.03 29,21 29,18.59 27.67,16.5 25.72,15.38 26.21,14.71 26.5,13.89 26.5,13 c 0,-2.21 -1.79,-4 -4,-4 z%22 style=%22opacity:1;fill:%23000000;fill-opacity:1;fill-rule:nonzero;stroke:%23000000;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1%22/></svg>',
+};
 
-var init = function() {
+function svg_piece_theme(piece) {
+	return svg_pieces[piece];
+}
+
+function init() {
 	unique = get_unique();
 
 	// Load settings from HTML5 local storage if available.
-	if (supports_html5_storage() && localStorage['enable_sound']) {
-		set_sound(parseInt(localStorage['enable_sound']));
+	if (supports_html5_storage() && window['localStorage']['enable_sound']) {
+		set_sound(parseInt(window['localStorage']['enable_sound']));
 	} else {
 		set_sound(false);
 	}
 
+	let admin_match = window.location.href.match(/\?password=([a-zA-Z0-9_-]+)/);
+	if (admin_match !== null) {
+		admin_password = admin_match[1];
+	}
+
 	// Create board.
 	board = new window.ChessBoard('board', {
 		onMoveEnd: function() { board_is_animating = false; },
 
 		draggable: true,
+		pieceTheme: svg_piece_theme,
 		onDragStart: onDragStart,
 		onDrop: onDrop,
 		onSnapEnd: onSnapEnd
 	});
-	$("#board").on('mousedown', '.square-55d63', mousedownSquare);
-	$("#board").on('mouseup', '.square-55d63', mouseupSquare);
+	document.getElementById("board").addEventListener('mousedown', mousedownSquare);
+	document.getElementById("board").addEventListener('mouseup', mouseupSquare);
 
+	if (window['inline_json']) {
+		let j = window['inline_json'];
+		process_update_response(j['data'], { 'get': (h) => j['headers'][h] });
+		delete window['inline_json'];
+	}
 	request_update();
-	$(window).resize(function() {
+	window.addEventListener('resize', function() {
 		board.resize();
 		update_sparkline(displayed_analysis_data || current_analysis_data);
 		update_board_highlight();
 		redraw_arrows();
 	});
-	$(window).keyup(function(event) {
+	new ResizeObserver(() => update_sparkline(displayed_analysis_data || current_analysis_data)).observe(document.getElementById('scoresparkcontainer'));
+	window.addEventListener('keyup', function(event) {
 		if (event.which == 39) {  // Left arrow.
 			next_move();
 		} else if (event.which == 37) {  // Right arrow.
 			prev_move();
 		} else if (event.which >= 49 && event.which <= 57) {  // 1-9.
-			var num = event.which - 49;
+			let num = event.which - 49;
 			if (current_games && current_games.length >= num) {
 				switch_backend(current_games[num]);
 			}
@@ -2261,6 +2592,6 @@ var init = function() {
 	window.addEventListener('hashchange', possibly_switch_game_from_hash, false);
 	possibly_switch_game_from_hash();
 };
-$(document).ready(init);
+document.addEventListener('DOMContentLoaded', init);
 
 })();
diff --git a/www/manual-override.pl b/www/manual-override.pl
new file mode 100755
index 0000000..23f571f
--- /dev/null
+++ b/www/manual-override.pl
@@ -0,0 +1,42 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+use DBI;
+use DBD::Pg;
+use CGI;
+use Encode;
+use lib qw(..);
+require 'config.pm';
+
+my $dbh = DBI->connect($remoteglotconf::dbistr, $remoteglotconf::dbiuser, $remoteglotconf::dbipass)
+        or die DBI->errstr;
+$dbh->{RaiseError} = 1;
+
+my $cgi = CGI->new;
+my $password = Encode::decode_utf8($cgi->param('password'));
+if (!defined($password) || $password ne $remoteglotconf::adminpass) {
+	print CGI->header(-type=>'text/plain; charset=utf-8', -status=>'403 Denied');
+	print "Nope.\n";
+	exit;
+}
+
+if ($cgi->param('move') eq 'null') {
+	$dbh->do('DELETE FROM game_extensions WHERE fen=? AND history=? AND player_w=? AND player_b=?',
+		undef,
+		Encode::decode_utf8($cgi->param('fen')),
+		Encode::decode_utf8($cgi->param('history')),
+		Encode::decode_utf8($cgi->param('player_w')),
+		Encode::decode_utf8($cgi->param('player_b')));
+} else {
+	$dbh->do('INSERT INTO game_extensions ( fen, history, player_w, player_b, ts, next_move ) VALUES ( ?, ?, ?, ?, CURRENT_TIMESTAMP, ? )',
+		undef,
+		Encode::decode_utf8($cgi->param('fen')),
+		Encode::decode_utf8($cgi->param('history')),
+		Encode::decode_utf8($cgi->param('player_w')),
+		Encode::decode_utf8($cgi->param('player_b')),
+		Encode::decode_utf8($cgi->param('move')));
+}
+system("sudo", "/usr/bin/touch", $remoteglotconf::target);
+
+print CGI->header(-type=>'text/plain; charset=utf-8');
+print "OK\n";