var count=0;//做计数器
var limit=new Array();//用于记录当前显示的哪几个菜单
var countlimit=1;//同时打开菜单数目，可自定义
function expandIt(el) {
obj = eval("sub" + el);
	if (obj.style.display == "none") {
		obj.style.display = "block";//显示子菜单
		if (count<countlimit) {//限制2个
		limit[count]=el;//录入数组
		count++;
		}
		else {
		eval("sub" + limit[0]).style.display = "none";
		for (i=0;i<limit.length-1;i++) {limit[i]=limit[i+1];}//数组去掉头一位，后面的往前挪一位
		limit[limit.length-1]=el;
		}
	}
	else {
	obj.style.display = "none";
	var j;
	for (i=0;i<limit.length;i++) {if (limit[i]==el) j=i;}//获取当前点击的菜单在limit数组中的位置
	for (i=j;i<limit.length-1;i++) {limit[i]=limit[i+1];}//j以后的数组全部往前挪一位
	limit[limit.length-1]=null;//删除数组最后一位
	count--;
	}
}


var ie = document.all ? 1 : 0
var ns = document.layers ? 1 : 0
var master = new Object("element")
master.curLeft = -120;	master.curTop = 10;
master.gapLeft = 0;
master.gapTop = 0;
master.timer = null;
function moveAlong(layerName, paceLeft, paceTop, fromLeft, fromTop){
clearTimeout(eval(layerName).timer)
if(eval(layerName).curLeft != fromLeft){
     if((Math.max(eval(layerName).curLeft, fromLeft) - Math.min(eval(layerName).curLeft, fromLeft)) < paceLeft){eval(layerName).curLeft = fromLeft}
else if(eval(layerName).curLeft < fromLeft){eval(layerName).curLeft = eval(layerName).curLeft + paceLeft}
else if(eval(layerName).curLeft > fromLeft){eval(layerName).curLeft = eval(layerName).curLeft - paceLeft}
if(ie){document.all[layerName].style.left = eval(layerName).curLeft}
if(ns){document[layerName].left = eval(layerName).curLeft}
}
if(eval(layerName).curTop != fromTop){
     if((Math.max(eval(layerName).curTop, fromTop) - Math.min(eval(layerName).curTop, fromTop)) < paceTop){eval(layerName).curTop = fromTop}
else if(eval(layerName).curTop < fromTop){eval(layerName).curTop = eval(layerName).curTop + paceTop}
else if(eval(layerName).curTop > fromTop){eval(layerName).curTop = eval(layerName).curTop - paceTop}
if(ie){document.all[layerName].style.top = eval(layerName).curTop}
if(ns){document[layerName].top = eval(layerName).curTop}
}
eval(layerName).timer=setTimeout('moveAlong("'+layerName+'",'+paceLeft+','+paceTop+','+fromLeft+','+fromTop+')',30)
}
function setPace(layerName, fromLeft, fromTop, motionSpeed){
eval(layerName).gapLeft = (Math.max(eval(layerName).curLeft, fromLeft) - Math.min(eval(layerName).curLeft, fromLeft))/motionSpeed
eval(layerName).gapTop = (Math.max(eval(layerName).curTop, fromTop) - Math.min(eval(layerName).curTop, fromTop))/motionSpeed
moveAlong(layerName, eval(layerName).gapLeft, eval(layerName).gapTop, fromLeft, fromTop)
}
var expandState = 0
function expand(){
if(expandState == 0){setPace("master", 0, 10, 10); if(ie){document.menutop.src = "http://www.51fdc.com/imageshome/menub.gif"}; expandState = 1;}
else{setPace("master", -120, 10, 10); if(ie){document.menutop.src = "http://www.51fdc.com/imageshome/menu.gif"}; expandState = 0;}
}


function MM_open(theURL,winName,features) { //v2.0
        window.open(theURL,winName,features);}