<script>

    // Maximum security unhackable login method.

    var username = 'username',
        password = 'password';

    if($('#username').val() == username && $('#password').val() == password) {
        location.href = 'super_secret_administration_page_noone_can_get_in.php';
    }
    else {
        alert('Hiba!');
    }

</script>