function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"));
        map.setCenter(new GLatLng(51.71884,-0.287447), 15);
		/*var point = new GLatLng(51.717936,-0.285645);
		map.addOverlay(new GMarker(point));*/
		
function createMarker(point, number)
{
  var marker = new GMarker(point);
  // Show this markers index in the info window when it is clicked
  var html =  number;
  GEvent.addListener(marker, "click", function() {marker.openInfoWindowHtml(html);});
  return marker;
};

//Old Address: var point = new GPoint(-0.134112658663478,51.5182556828574 );
var point = new GLatLng(51.71884,-0.287447);
var marker = createMarker(point, '<p><strong>TVAV Installations</strong></p><p>Victor House,<br/>Barnet Road,<br />London Colney,<br />Herts.<br />AL2 1BJ');
map.addOverlay(marker);

        map.setUIToDefault();
      }
    }