public void GetCaptchas()
        {
            var    svc    = new PassportService();
            Random rdm    = new Random();
            var    result = svc.GetCaptchas();

            Session[CAPTCHAS_TEXT] = result.Text;
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            result.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            Response.ClearContent();
            Response.ContentType = "image/Gif";
            Response.BinaryWrite(ms.ToArray());
        }