var map;

function initmap() {
  if (GBrowserIsCompatible()) {
    map = new GMap(document.getElementById("smap"));
    map.setCenter(new GLatLng( 52.500700, 13.435100), 13);
    var marker = new GMarker(new GPoint(13.435100,52.500700));
    map.addOverlay(marker);
  }
}