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)};