var top_menu_items  = 4;

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;

}

// Close Layer Then Click-out
document.onclick = mclose;