[jQuery] post ajax jquery

[jQuery] post ajax jquery

hi, i tryed do it
<a href="http://www.malsup.com/jquery/form/#getting-started">http://www.malsup.com/jquery/form/#getting-started</a>
but my form do submit normal, and not in ajax...
so no return <code class="mix"><span class="com">callback function</span>
somebody can help-me ?
thanks
code
------------
</code><pre><code class="mix"><span class="tag"><script type="text/javascript" src="lib/jquery.js"></script>
<script type="text/javascript" src="lib/jquery.form.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('#myForm').ajaxForm(function() {
alert("Thank you for your comment!");
var queryString = $('#myForm').formSerialize();

// the data could now be submitted using $.get, $.post, $.ajax, etc
$.post('teste.php', queryString);
});
});

</script>
</head>
<body>
<form id="myForm" action="test.php" method="post">
Name: <input type="text" name="name" /> <br />
Comment: <textarea name="comment"></textarea>
<input type="submit" value="Submit " />
</form>
</body></span><span class="tag"></span></code></pre>
<code class="mix">
</code>