if((navigator.appName == "Netscape")){ // For Firefox
	var arrMenu = new Array("not use", "", "", "", "", "", "", "", "", "" ,"");
	var curLevel = 0;
	var maxLevel = 10;
	
	function falsefunc(){ return false; }
	
	function popUp(obj, name, level, x, y, wid, hei){
		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){
				if(level <= 1){
					curleft += obj.offsetLeft;
					curtop += obj.offsetTop;
				}
			}
		}
		document.getElementById(name).style.left = (curleft + x) + wid + 'px';
		document.getElementById(name).style.top = (curtop + y) + hei + 'px';
	}
	
	function popDown(level){
		for(i = level; i <= maxLevel; i++){
			if(arrMenu[i] != ""){ document.getElementById(arrMenu[i]).style.visibility = "hidden"; }
		}
	}
}else{ // For Internet Explorer
	var arrMenu = new Array("not use", "", "", "", "", "", "", "", "", "" ,"");
	var curLevel = 0;
	var maxLevel = 10;
	
	function falsefunc(){ return false; }
	
	function popUp(obj, name, level, x, y, wid, hei){
		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){
				if(level <= 1){
					curleft += obj.offsetLeft;
					curtop += obj.offsetTop;
				}
			}
		}
		document.getElementById(name).style.left = (curleft + x) + wid + 'px';
		document.getElementById(name).style.top = (curtop + y) + hei + 'px';
	}
	
	function popDown(level){
		for(i = level; i <= maxLevel; i++){
			if(arrMenu[i] != ""){ document.getElementById(arrMenu[i]).style.visibility = "hidden"; }
		}
	}
}