// 指向变换背景图片
function ChangeBackground(MyObj,NewBackground){ 
  MyObj.style.backgroundImage=NewBackground;
}   
window.onload=menuFix;
function menuFix() {
	var sfEls = document.getElementById("mainMenu").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"),"");
		}
	}
}
// F7左侧菜单变换
function OverLvMenu(d,b,c){
	if(d){d.style.background=c;d.style.color="#990000";d.className=b+" leftmenu_bc"}return false}
function OutLvMenu(d,b,c){
	if(d){d.className=b;d.style.background=c;d.style.color="#222222"}return false}