$(function () {
        $('#pseudoForm').on('click', '#submit', function (e) {
            e.preventDefault();
            $.ajax({
                type: "POST",
                url: "psu_output.php",
                data: $('#pseudoForm').serialize(),
                datatype: 'json',
                success: function (response) {
                if(response.type == 'success') {
                        $('#messages').addClass('alert alert-success').text(response.message);
                } else {
                        $('#messages').addClass('alert alert-danger').text(response.message);
                    }
                }
            });
            return false;
        });
    });
</script>

<?php

$success = true;

if($success == true) {
    $output = json_encode(array('type'=>'success', 'message' => 'YAY'));
} else {
    $output = json_encode(array('type'=>'error', 'message' => 'WHOOPS'));
}

die($output);
?>