public ActionResult BeginSection(string section, bool isSMS)
        {
            DateTime?startTime = null;
            DateTime?endTime   = null;

            if (section == "morning")
            {
                endTime = Convert.ToDateTime("13:00:00");
            }
            if (section == "afternoon")
            {
                startTime = Convert.ToDateTime("13:00:00");
            }

            var result = ds.BegioSection(startTime, endTime, UserCache.CurrentUser.Id, isSMS);

            return(Json(new { validate = result }));
        }