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);