map.fitBounds

gistfile1.js

              var NorthEast = new google.maps.LatLng(
                DefaultMapLocation.NorthEast.Latitude,
                DefaultMapLocation.NorthEast.Longitude
              );
              var SouthWest = new google.maps.LatLng(
                DefaultMapLocation.SouthWest.Latitude,
                DefaultMapLocation.SouthWest.Longitude
              );

              var bounds = new google.maps.LatLngBounds();
              bounds.extend(NorthEast);
              bounds.extend(SouthWest);

              map.fitBounds(bounds);