function initialize() {
        var mapOptions = {
          zoom: 13,
          center: new google.maps.LatLng(18.314114582548655, -65.29294967651367),
          mapTypeId: google.maps.MapTypeId.SATELLITE
        }
        var map = new google.maps.Map(document.getElementById('map_canvas'),
                                      mapOptions);
		var transitLayer = new google.maps.TransitLayer();
		transitLayer.setMap(map);
        setMarkers(map, beaches);
      }
      var beaches = [
['Flamenco Beach',18.328088387308334,-65.318012237548830,'<div class="infoWindow"><img src="http://www.islaculebra.com/shelter/images/hammock.JPG" alt="Flamenco Beach" border="0" hspace="5" align="left" height="80"><div class="popuptitle"><a href="http://www.islaculebra.com/puerto-rico/culebra-flamenco-beach.html" title="Flamenco Beach">Flamenco Beach</a><br><div class="popup">THE beach on Culebra!</div></div></div>','blue'],
['Tamarindo Beach',18.318443323465660,-65.317840576171880,'<div class="infoWindow"><img src="http://culebra.org/images/tamarindo.jpg" alt="Tamarindo Beach" border="0" hspace="5" align="left" height="80"><div class="popuptitle"><a href="" title="Tamarindo Beach">Tamarindo Beach</a><br><div class="popup">Tamarindo is one the best snorkeling beaches in Culebra.</div></div></div>','blue'],
 ];

      function setMarkers(map, locations) {
		var shadow = new google.maps.MarkerImage('http://viennasapartments.com/images/mm_20_shadow.png',
			new google.maps.Size(22, 20),
			new google.maps.Point(0,0),
			new google.maps.Point(6, 20));
        for (var i = 0; i < locations.length; i++) {
          var beach = locations[i];
          var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
		  var image = new google.maps.MarkerImage('http://viennasapartments.com/images/mm_20_'+beach[4]+'.png',
			new google.maps.Size(12, 20),
			new google.maps.Point(0,0),
			new google.maps.Point(6, 20));
          var aptMarker = new google.maps.Marker({
              position: myLatLng,
              map: map,
              shadow: shadow,
              icon: image,
              title: beach[0],
              content: beach[3]
          });
		  var infowindow = new google.maps.InfoWindow({
			//content: beach[0]
		  });
		  google.maps.event.addListener(aptMarker, 'click', function() {
			  infowindow.setContent(this.content);
			  infowindow.open(map,this);
		  });
        }
      }

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