function showMap(div_id, lat, lng, scale) {
    if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById(div_id));
        map.setCenter(new GLatLng(lat, lng), scale);
        var marker = new GMarker(new GLatLng(lat, lng));
        map.addOverlay(marker);
        map.addControl(new GLargeMapControl());
        map.addControl(new GScaleControl());
    }
}