sfHover = function() {
var sfEls;
if(document.getElementById("nav")!=null){
//alert(document.getElementById("nav").getElementsByTagName("li"));
sfEls = document.getElementById("nav").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"), "");
		}
	}
}else{
//alert("empty");
}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);