function load() {
  if (GBrowserIsCompatible()) {
    var map = new GMap2(document.getElementById("map"));
    map.addControl(new GSmallMapControl());
    map.setCenter(new GLatLng(50.80377861236005, 3.2815003395080566), 11);

    GDownloadUrl("pointer.xml", function(data) {
      var xml = GXml.parse(data);
      var markers = xml.documentElement.getElementsByTagName("marker");
      for (var i = 0; i < markers.length; i++) {
      var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
                              parseFloat(markers[i].getAttribute("lng")));
        map.addOverlay(new GMarker(point));
        }
      });
    }
  }