function menuFix() {
	var sfEls = document.getElementById("nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
		this.className+=(this.className.length>0? " ": "") + "sfhover";
		}
		sfEls[i].onMouseDown=function() {
		this.className+=(this.className.length>0? " ": "") + "sfhover";
		}
		sfEls[i].onMouseUp=function() {
		this.className+=(this.className.length>0? " ": "") + "sfhover";
		}
		sfEls[i].onmouseout=function() {
		this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),"");
		}
	}
	//调整过长的Class名
	//var obj = document.getElementById("Class");
	//if (obj)
	//{
	//	strTxt =obj.innerText;
	//	strHTML =obj.innerHTML; //alert(obj.innerHTML)
		//alert(strTxt.length);
	//	if (strTxt.length>8)
	//	{obj.innerHTML=strHTML.replace(strTxt,"<span class=LongClass>"+strTxt+"</span>");}
	//}
}
window.onload=menuFix;