sfHover = function() {     
	var 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"), "");         
			}     
		} 
	} 
	if (window.attachEvent) window.attachEvent("onload", sfHover);