$(document).ready(function(){

	if (GBrowserIsCompatible()) {

	  map = new GMap2(document.getElementById("mapa"));
	  map.addControl(new GSmallMapControl());
	  map.addControl(new GMapTypeControl());

     var centro = new GLatLng(42.42943647739594, -8.651910221349985);
     
	  map.setCenter(centro, 15);

	  var imaco = new GMarker(centro);
	  map.addOverlay(imaco);

	}

    GEvent.addListener(map, "click", function(marker, point) {
      if(marker){
        marker.openInfoWindowHtml('Estamos aqui !!');
      }
    });

});

window.onunload = GUnload;