function initialize() {
  if (GBrowserIsCompatible()) {    
    var map = new GMap2(document.getElementById("googlemaps"));
    map.setCenter(new GLatLng(51.472716 , -0.109863), 8);
    var point = new GLatLng(51.273499, -0.072359);
    var marker_headoffice = new GMarker(point);
    GEvent.addListener(marker_headoffice, "click", function() {
    marker_headoffice.openInfoWindowHtml("<div align='center'><strong>Victorian Teaparty</strong><br />01622842913<br/>07749517985<br/><a href='mailto:rachel@victorianteaparty.co.uk'>rachel@victorianteaparty.co.uk</a></div>");
    })
    map.addOverlay(marker_headoffice);
    map.setUIToDefault();   
  }
}