var TimeOut         = 300;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

// Open Hidden Layer
function mopen(n){
	var l  = document.getElementById("menu"+n);
	var mm = document.getElementById("mmenu"+n);
	if(l){
		mcancelclosetime();
		l.style.visibility='visible';
		if(currentLayer && (currentLayerNum != n)){
			currentLayer.style.visibility='hidden';
		}
		currentLayer    = l;
		currentitem     = mm;
		currentLayerNum = n;
	}else if(currentLayer){
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
		currentitem  = null;
		currentLayer = null;
	}
}

// Turn On Close Timer
function mclosetime(){
	closeTimer = window.setTimeout(mclose, TimeOut);
}

// Cancel Close Timer
function mcancelclosetime(){
	if(closeTimer){
		window.clearTimeout(closeTimer);
		closeTimer = null;
	}
}

// Close Showed Layer
function mclose(){
	if(currentLayer && noClose!=1){
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
		currentLayer = null;
		currentitem = null;
	}else{
		noClose = 0;
	}
	currentLayer = null;
	currentitem  = null;
}

document.onclick = mclose;