navHover=function() {
var lis=document.getElementById("menu").getElementsByTagName("LI");
for (var i=0; i<lis.length; i++) {
lis[i].onmouseover=function() {
this.className+=" iehover";
}

lis[i].onmouseout=function() {
this.className=this.className.replace(new RegExp(" iehover\\b"), "");
}
}
}

if (window.attachEvent) window.attachEvent("onload", navHover);