sfHover = function(th) {
	var sfEls = th.getElementsByTagName("li");

	for (var i=0; i<sfEls.length; ++i) {

		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}

		sfEls[i].onmouseout=function() {
			this.className="";
		}
	}
}