public ActionResult ModifyPassword(String U_OldPassword, String U_Password)
        {
            User         m;
            ResponseJson resJson;

            m = (User)Session["User"];

            resJson = um.ModifyPassword(m.U_Id, U_OldPassword, U_Password);
            if (resJson.status == ResponseStatus.Success)
            {
                return(Redirect("/Contents/html/layer_close.htm"));
            }
            else if (resJson.status == ResponseStatus.Error)
            {
                ModelState.AddModelError("", resJson.message);
            }

            return(View(new VMUserModifyPassword()));
        }