var geocoder=null;
var map=null;
    function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"),
            { size: new GSize(480,400) } );
            var marker = new GMarker(new GLatLng(53.34616, -6.26722));
       map.addOverlay(marker);
        map.setCenter(new GLatLng(53.34616, -6.26722), 15);
        var customUI = map.getDefaultUI();
        // Remove MapType.G_HYBRID_MAP
        customUI.maptypes.hybrid = false;
        map.setUI(customUI);
      }
    }