sfHover = function() {
	var sfEls = document.getElementById("nav_menu").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 (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img1.src = "http://www.hoopchina.com/includes/images/bg_redoff.gif";
   img2.src = "http://www.hoopchina.com/includes/images/bg_on.gif"
}
if (window.attachEvent) window.attachEvent("onload", sfHover);