title: Zoom_changed - Center
body: <p>I've been stuck on this for a while and therefore simplified my 
  requirement. 
  When you click on a marker an infowindow opens, when a user zooms I 
  want that marker to be in the center of the map. 
  This doesn't work but I think it's close: </p>
  
  <pre><code>function bindInfoWindow(marker, map, infoWindow, html) { 
        google.maps.event.addListener(marker, 'click', function() { 
          infoWindow.setContent(html); 
          infoWindow.open(map, marker); 
        }); 
            google.maps.event.addListener(map, 'zoom_changed', function() { 
                  infoWindow.setCenter(infoWindow.getCenter()); 
                  }); 
      } 
  </code></pre>
  
  <p><a href="http://www.hostelbars.com/map_test_v3_1.html" rel="nofollow">http://www.hostelbars.com/map_test_v3_1.html</a></p>