var currentLayer = null;
var currentLayerNum = 0;
var noClose = 0;
var closeTimer = null;

function mopen(n)
{
	var l = document.getElementById("menu"+n);

	if(l)
	{
		mcancelclosetime();
				
		l.style.visibility='visible';

//		if(currentLayer && (currentLayerNum != n))
//			currentLayer.style.visibility='hidden';
				    
		currentLayer = l;
		currentLayerNum = n;
	}
	else if(currentLayer)
	{
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
	}
			
}

function mclosetime()
{
	closeTimer = window.setTimeout(mclose, 500);
}

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

function mclose()
{
	if(currentLayer && noClose!=1)
	{
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
	}
	else
	{
		noClose = 0;
	}
}

document.onclick = mclose;