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);