function initialize() {
  if (GBrowserIsCompatible()) {    
    var map = new GMap2(document.getElementById("googlemaps"));
    map.setCenter(new GLatLng(51.181686, -3.446678), 16);
    var point = new GLatLng(51.181686, -3.446678);
    var marker_headoffice = new GMarker(point);
    GEvent.addListener(marker_headoffice, "click", function() {
        marker_headoffice.openInfoWindowHtml("<div align='center'><strong>The Oval</strong><br />17 West Street<br/>Dunster<br/>Somerset<br/>TA24 6SN</div>");
    })
    map.addOverlay(marker_headoffice);
    map.setUIToDefault();   
  }
}