function googlemap(lat,lng,zoom,text){
        if (GBrowserIsCompatible()) {
                var map = new GMap2(document.getElementById("map_canvas"));
                map.setCenter(new GLatLng(lat, lng),zoom);

                map.addControl(new GLargeMapControl());
                map.addControl(new GMapTypeControl());

                map.clearOverlays();
                var marker = new GMarker(new GLatLng(lat, lng));

                if (text != ""){
                        map.addOverlay(marker);
                        marker.openInfoWindowHtml(text);
                }
        }
}