public function loguj($user,$pass)
    {
        $lacz = $this->laczbd();
        if(!$lacz) return 0;
        $wynik = $lacz->query("select * from users where login='$user' and haslo=MD5('$pass')");
        if(!$wynik)
            return 0;
        if($wynik->num_rows>0)
            return 1;
        else
            return 0;
    }

    public function logowanie()
    {
        if($_GET["akcja"]=="logout")
        {
            unset($_SESSION['zalogowany']);
            session_destroy();
            Header("Location: index.php");
        }    
        
        if($_GET["akcja"]=="login")
        {
            $user = $_POST["login"];
            $pass = $_POST["pass"];
            if($this->loguj($user,$pass))
            {
                $wynik->fetch_array();
                $_SESSION['zalogowany'] = "tak";
                $_SESSION['access'] = $wynik[0];
                $_SESSION['user'] = $wynik[3];
                header("Location: index.php");
            }
        }
    }