var geo = {
    loadCities: function (source, target, sl_target) {
        $.ajax({
            type: 'get',
            url: baseDir + 'city.php?param=city&id_country=' + $(source).val(),
            success: function (data) {
                $(target).empty();
                $(target).removeAttr('disabled');
                $(target).html(data);

                if (typeof (sl_target) != 'undefined') {
                    $(target).val($(sl_target).val());
                }
            }
        });
    }
}