Submit form (methd post) with jQuery/AJAX

How can I submit my form with AJAX using jQuery?  It must be sent method=post.

This code submits NO data. I want to submit the data in my form using jQuery.  This code submits blank.  While it connects to submit.php, no data is submitted.

<form action="submit.php" method="post">
<p><label for="name"><strong>Name</strong><em class="required"></em></label><span class="transInput"><input type="text" name="name" id="name" class="i1" /></span></p>
<p><label for="email"><strong>Email</strong><em class="required"></em></label><span class="transInput"><input type="text" name="email" id="email" class="i1" /></span><input type="text" name="spmchk" class="spmchk" /></p>
<p><label for="website"><strong>Website</strong></label><span class="transInput"><input type="text" name="website" id="website" class="i1" /></span></p>
<p><label for="comments"><strong>Message</strong><em class="required"></em></p></div><textarea rows="6" cols="55" name="comments" id="comments"></textarea></p>
<p class="submitLeft"><input type="submit" value="submit" class="submitLeftInput" id="submitButton" /></p>
</form> 
 
<script type="text/javascript">
$(document).ready(function() { 
    //if submit button is clicked   
    $('#submitButton').click(function () {           
     $.post('/submit.php');         
    return false; //cancel the submit button default behaviours
    });   
});
</script>

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