subHover = function() {
var subEls = document.getElementById("nav").getElementsByTagName("LI");
for (var i=0; i<subEls.length; i++) {
subEls[i].onmouseover=function() {
this.className+=" subhover";
}
subEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("subhover\\b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", subHover);