//función para usar las capas
		function MM_showHideLayers() { //v6.0
			var i,p,v,obj,args=MM_showHideLayers.arguments;
			for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
				if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
				obj.visibility=v; }
		}