protected void clear_cart(object sender, EventArgs e)
        {
            HttpCookie cookie = Request.Cookies["user_id"];//getting the user_id

            Process_Executor exec = new Process_Executor();

            string response = exec.clear_cart(cookie.Value);

            if (response == "CART_EMPTY")
            {
                Response.Redirect("~/Default");
            }
        }