public ActionResult delete(Int32 id = 0, string returnUrl = "/admin_ads")
        {
            // Get the current domain
            Domain currentDomain = Tools.GetCurrentDomain();
            ViewBag.CurrentDomain = currentDomain;

            // Get query parameters
            ViewBag.QueryParams = new QueryParams(returnUrl);

            // Check if the administrator is authorized
            if (Administrator.IsAuthorized(new string[] { "Administrator" }) == true)
            {
                ViewBag.AdminSession = true;
            }
            else if (Administrator.IsAuthorized(Administrator.GetAllAdminRoles()) == true)
            {
                ViewBag.AdminSession = true;
                ViewBag.AdminErrorCode = 1;
                ViewBag.TranslatedTexts = StaticText.GetAll(currentDomain.back_end_language, "id", "ASC");
                return View("index");
            }
            else
            {
                // Redirect the user to the start page
                return RedirectToAction("index", "admin_login");
            }

            // Create an error code variable
            Int32 errorCode = 0;

            // Delete the ad post and all the connected posts (CASCADE)
            errorCode = Ad.DeleteOnId(id);

            // Check if there is an error
            if (errorCode != 0)
            {
                ViewBag.AdminErrorCode = errorCode;
                ViewBag.TranslatedTexts = StaticText.GetAll(currentDomain.back_end_language, "id", "ASC");
                return View("index");
            }

            // Redirect the user to the list
            return Redirect(returnUrl);

        } // End of the delete method