function mostrarCapa(mapa) 
        { 
		
		for (i = 0; i < 18; i++) 
		
		{
       document.getElementById("capa" + i).style.display = 'none';
		}
                document.getElementById(mapa).style.display = 'block';
        } 
		          
		function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
		}