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