sfHover = function()
{
var sfEls = document.getElementById("top_menu").getElementsByTagName("LI");
for (var i=0; i<sfEls.length; i++)
{
sfEls[i].onmouseover=function()
{
this.className+=" sfhover";
}

sfEls[i].onmouseout=function()
{
this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);