sfHover = function() {
var sfEls = document.getElementById("menu").getElementsByTagName("LI");
for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
				this.className+="sfhover";
		}
		sfEls[i].onmouseover=function() {
				this.className=this.className.replace(new RegExp("sfhover\\b"), "");
		}
}
}
if (window.attachEvent) window.attachEvent("onload", sfhHover);