// map 

    function map_init() {

      if (GBrowserIsCompatible()) {
        map = new GMap2(document.getElementById("map_canvas"));
        map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());
	point = new GLatLng(51.903612, -0.087890);
	point = new GLatLng(51.820000, -0.060424);
        map.setCenter(point, 9);
	point = new GLatLng(51.907764, -0.111515);
        var marker = new GMarker(point);
        map.addOverlay(marker);
        GEvent.addListener(marker, "click", function() {
            marker.openInfoWindowHtml("<font height=20 face=tahoma color=black><b>Walkern Hall</b><br/>Walkern, Stevenage,<br/>Hertfordshire SG2 7JA</font>");});
      }
    }

    function mapshowAddress(fromaddr) {
      geocoder = new GClientGeocoder();
      if (geocoder) {
          geocoder.getLatLng(
          fromaddr,
          function(point) {
            if (!point) {
              alert("Sorry we can't find that address - Please try again");
            } else {
	      self.open("./directions.html?"+fromaddr); 
            }
          }
        );
      }

    }