public ActionResult Index()
        {
            HomeViewModel h = new HomeViewModel();

            return View(h);
        }
        public ActionResult WebClick(int? id)
        {
            tbl_Website web = new tbl_Website();
            tbl_Account acc = new tbl_Account();
            long coinPerClick = 0;
            long coinPerDay = 0;
            int id_acc;
            DateTime lastClick;
            long timeSpan = 0;
            try
            {
                DateTime now = DateTime.Now;

                web = db.tbl_Website.Where(m => m.ID_Web == id).FirstOrDefault();
                if (web.LastClick != null)
                {
                    lastClick = (DateTime)web.LastClick;
                    timeSpan = (now - lastClick).Minutes;
                }
                else
                {
                    web.LastClick = now;
                    timeSpan = 11;
                }
                if (timeSpan > 10)
                {
                    coinPerClick = (long)web.CoinPerClick;
                    id_acc = (int)web.ID_Account;
                    acc = db.tbl_Account.Where(m => m.ID_Account == id_acc).FirstOrDefault();
                    coinPerDay = (long)acc.CoinPerDay;
                    if (coinPerDay >= coinPerClick)
                        acc.CoinPerDay -= coinPerClick;
                    else if (acc.TotalCoin >= coinPerClick)
                        acc.TotalCoin -= coinPerClick;
                    if (coinPerDay < coinPerClick && acc.TotalCoin < coinPerClick)
                        web.Active = 0;
                    web.LastClick = now;
                    web.TongSoClick++;
                }
                else
                {
                    web.SoClickFree++;
                    web.TongSoClick++;
                }

                db.SaveChanges();
            }catch(Exception)
            {

            }
            HomeViewModel h = new HomeViewModel();
            return View(h);
        }