function generatePermalink() {
    var center = map.getCenter();
    var zoom   = map.getZoom()
    var url = thisurl + '?' + SEARCH_STRING + '&zoom=' + zoom + '&lat=' + center.lat() + '&lon=' + center.lng();
    window.open(url);
}

function gotoLatLonZoom(lat,lon,zoom) {
    if (!lat || !lon || !zoom) return;
    lat = parseFloat(lat);
    lon = parseFloat(lon);
    zoom = parseInt(zoom);
    map.setCenter(new GLatLng(lat,lon) , zoom );
}