function abrir() 
		{        	
			hideLayer(document.getElementById("cerrado"));
			showLayer(document.getElementById("abierto"));
		}
		
		function hideLayer(layer)
		{
			layer.style.display = 'none';
		}
		
		function showLayer(layer)
		{
			layer.style.display = '';
		}
function cerrar() 
		{        	
			hideLayer(document.getElementById("abierto"));
			showLayer(document.getElementById("cerrado"));
		}
		
		function hideLayer(layer)
		{
			layer.style.display = 'none';
		}
		
		function showLayer(layer)
		{
			layer.style.display = '';
		}