var arrMenu = new Array("not use","","","");
var curLevel = 0;
var maxLevel = 3;
function falsefunc(){ return false; }
function popUp(obj,name,level,x,y,e){
	document.onmouseover = falsefunc;
	for(i=level;i<=maxLevel;i++){
		if(arrMenu[i] != ""){ document.getElementById(arrMenu[i]).style.visibility = "hidden"; }
	}
	curLevel = level;
	arrMenu[curLevel] = name;
	document.getElementById(name).style.visibility = "visible";
	var curleft = curtop = 0;
	if(obj.offsetParent){
		curleft = obj.offsetLeft;
		curtop = obj.offsetTop;
		while(obj = obj.offsetParent){
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		}
	}
	document.getElementById(name).style.left = (curleft + x) + 'px';
	document.getElementById(name).style.top = (curtop + y) + 'px';
}
function popDown(level){
	for(i=level;i<=maxLevel;i++){
		if(arrMenu[i] != ""){ document.getElementById(arrMenu[i]).style.visibility = "hidden"; }
	}
}