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);