//网站导航下拉
function getEl(id){
	return typeof(id) == 'string'?document.getElementById(id):id;
}

function menuFix(id,tagName) {
	var navEl=document.getElementById(id);
	if(!navEl){
		return;
	}
	var navEls = navEl.getElementsByTagName(tagName || "li");
	for (var i = 0; i < navEls.length; i++) {
		navEls[i].onmouseover = function() {
			this.className += (this.className.length > 0 ? " " : "") + "sfhover";
		};
		navEls[i].onMouseDown = function() {
			this.className += (this.className.length > 0 ? " " : "") + "sfhover";
		};
		navEls[i].onMouseUp = function() {
			this.className += (this.className.length > 0 ? " " : "") + "sfhover";
		};
		navEls[i].onmouseout = function() {
			this.className = this.className.replace(/( ?|^)sfhover\b/, "");
		};
	}
}

function windowOnLoad(func){
	if (window.addEventListener) {
		window.addEventListener("load", func, false);
	} else {
		window.attachEvent("onload", func);
	}
}

windowOnLoad(function(){menuFix('web_dropdown','li')});
windowOnLoad(function(){menuFix('web_dropdown1','li')});