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);