// 导航菜单
function menuFix()
{
	var sfEls = document.getElementById("nav").getElementsByTagName("li");
	for(var i=0;i<sfEls.length;i++) {
		var ulss=sfEls[i].getElementsByTagName("ul");
	}
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			var _self = this;
			setTimeout(function(){_self.className+=(_self.className.length>0? " ": "") + "show";}, 10);
		}
		sfEls[i].onmouseout=function() {
			var _self = this;
			setTimeout(function(){_self.className=_self.className.replace(new RegExp("( ?|^)show\\b"), "");}, 10);
		}
	}
}
window.onload = menuFix;