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);