/* 用于整站顶部导航下拉菜单 */
function menuFix() {
	if (document.getElementById("nav"))
	{
		
		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].onmouseout=function() {
		this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), "");
		}
	}
	}
	


	 
}
window.onload=menuFix;