<a href="javascript:stopcarousel();showgroup('Group A')">show group A</a>
<a href="javascript:stopcarousel();showgroup('Group B')">show group B</a>
<a href="javascript:stopcarousel();showgroup('Group C')">show group C</a>
<a href="javascript:stopcarousel();showgroup('Group A')">show group A</a>
<a href="javascript:stopcarousel();showgroup('Group B')">show group B</a>
<a href="javascript:stopcarousel();showgroup('Group C')">show group C</a>