var map;
      function initialize() {
       var mapOptions = {
          zoom: 5,
          center: new google.maps.LatLng(41.530,12.280),
          mapTypeId: google.maps.MapTypeId.HYBRID
        };
        map = new google.maps.Map(document.getElementById('map_canvas'),
            mapOptions);
			
      google.maps.event.addDomListener(window, 'load', initialize);

 }
      google.maps.event.addDomListener(window, 'load', initialize);