// GET: Login
    public ActionResult Login()
    {
        return View();
    }
    [HttpPost]
    public ActionResult Login(string username, string password)
    {
        bool isAuthenticated = PCSSession.Current.AuthenticateUser(username, password);

        if(isAuthenticated)
        {

            return RedirectToAction("Landing","Start");
        }
        else
        {
            return RedirectToAction("Login", "Login");
        }

    }

<script>


$("#btnLogin").click(function () {
    $.post("/Login/Login",
        {
            username: $('#Username').val(),
            password: $('#Password').val(),
        },
        function (data) {
            if (data == "True") {

            } else {

            }
        });
});