<public:component>
<public:attach event="onmouseover" onevent="hover()" />
<public:attach event="onmouseout" onevent="dehover()" />

<script type="text/javascript">
function hover()
{
 if (!/MSIE (5\.5|6\.)/.test(navigator.userAgent)) return;
  this.className = 'hover';
}
function dehover()
{
 if (!/MSIE (5\.5|6\.)/.test(navigator.userAgent)) return;
  this.className = '';
}
</script>
</public:component>