<public:attach event="onmouseover" onevent="show_child()" />
<public:attach event="onmouseout" onevent="hide_child()" />
<script type="text/javascript">
  function show_child()
  	{
  	var childUl = element.childNodes[2];
    if (childUl)
      childUl.className = childUl.className + " visible";
  	}

  function hide_child()
  	{
  	var childUl = element.childNodes[2];
    if (childUl)
      childUl.className = childUl.className.substr
        (0,childUl.className.indexOf(" visible"));
  	}
</script>
