protected void submitBtn_Click(object sender, EventArgs e)
        {
            GeetestLib geetest = GeetestLib.getGtSession(Session);
            int        gt_server_status_code = GeetestLib.getGtServerStatusSession(Session);
            String     result = "";

            if (gt_server_status_code == 1)
            {
                result = geetest.enhencedValidateRequest(Request);
            }
            else
            {
                result = geetest.failbackValidateRequest(Request);
            }
            Response.Write(result);
        }