window.attachEvent("onload",ddm_init);
function ddm_init() {
 var tn=document.getElementsByTagName("ul");
 for (var i=0; i < tn.length; i++)
  if (tn[i].className.match(/(^| )dropdown($| )/))
   tn[i].innerHTML=tn[i].innerHTML.replace(/(<li)/ig,
    '<li onmouseover="ddm_over(this);" onmouseout="ddm_out(this);"');
}
function ddm_over(elm) {
 if (elm.getElementsByTagName("ul")[0])
  elm.getElementsByTagName("ul")[0].style.visibility="visible";
}
function ddm_out(elm) {
 if (elm.getElementsByTagName("ul")[0])
  elm.getElementsByTagName("ul")[0].style.visibility="hidden";
}