$(document).ready(function() {
   if (GBrowserIsCompatible()) {
      var map = new GMap2(document.getElementById("google_map"));
      latlng = new GLatLng(53.977405,-1.12858);
      map.setCenter(latlng, 10);

      var mapIcon = new GIcon();
      mapIcon.image = "http://www.gear4music.com/images/map_overlay_shadow.png";
      mapIcon.iconSize = new GSize(64, 57);
      mapIcon.iconAnchor = new GPoint(32, 57);

      // Set up our GMarkerOptions object
      markerOptions = { icon: mapIcon };
      map.addOverlay(new GMarker(latlng, markerOptions));
   }
});