function initialize() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.setMapType(G_PHYSICAL_MAP);
var bounds = map.getBounds();
var southWest = bounds.getSouthWest();
var northEast = bounds.getNorthEast();
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
var center = new GLatLng(southWest.lat() + latSpan * Math.random(), southWest.lng() + lngSpan * Math.random());
map.setCenter(center, 5);
var marker = new GMarker(center, {draggable: true});
GEvent.addListener(marker, "dragstart", function() {
  map.closeInfoWindow();
  });
map.addOverlay(marker);
map.setUIToDefault();
}
}