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);