function initialize() {
  var map = new GMap2(document.getElementById("map_canvas"));
  map.setMapType(G_HYBRID_MAP);
  map.setCenter(new GLatLng(45.498105, -73.564914), 16);
  var bounds = map.getBounds();
  var southWest = bounds.getSouthWest();
  var northEast = bounds.getNorthEast();
  var lngSpan = northEast.lng() - southWest.lng();
  var latSpan = northEast.lat() - southWest.lat();
  map.addOverlay(new GMarker(new GLatLng(45.497865, -73.564780), 16));
  map.addControl(new GSmallZoomControl())  
  map.addControl(new GMapTypeControl())
}