var time_out = 0;
var currentLayer;
var currentitem;
var currentLayerNum;
var noClose;
var closeTimer;

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;
		}
	}

	function mclosetime() {
		closeTimer = window.setTimeout(mclose, time_out);
	}

	function mcancelclosetime() {
	if(closeTimer) {
		window.clearTimeout(closeTimer);
		closeTimer = null;
	}

}

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;