function agregarBackgroundControl(map){
		function Faldon() {
		}
		Faldon.prototype = new GControl();
		Faldon.prototype.initialize = function(map) {

			var container = document.createElement('div');
			container.setAttribute('style','background-color: black; width: 100%; height: 27px; opacity: 0.2');
			container.style.backgroundColor = '#000000';
			container.style.filter = 'alpha(opacity=20)';
			container.style.width = '100%';
			container.style.height = 27;
			map.getContainer().appendChild(container);
			return container;

		}

		Faldon.prototype.getDefaultPosition = function() {
			return new GControlPosition(G_ANCHOR_TOP_LEFT, new GSize(0, 0));
		}

		map.addControl(new Faldon());
	}