var timer;

	function showMenuLayer(Layername) 
	{
		clearTimeout(timer);
		hideAll();
		
		document.getElementById(Layername).style.display='block';
	}
	
	function hideMenuLayer(Layername) 
	{
		document.getElementById(Layername).style.display='none';
	}
	
	function hideAll()
	{
		for (i=0;i<layerList.length;i++){
			hideMenuLayer(layerList[i]);
		}
	}
	
	function backToActiveLayer(delay){
		clearTimeout(timer);
		timer = setTimeout('backToActiveLayerAction()', delay);
	}
	
	function backToActiveLayerAction (){
		hideAll();
		if (typeof(activeLayer) != 'undefined'){
			document.getElementById(activeLayer).style.display='block';
		}
	}