How to process posted data using ajax inside a tab?

How to process posted data using ajax inside a tab?

hi, iam a new jquery user. I loaded a php file inside a tab using an example given in jquery website, say example.html.
I did not alter the javscript part. The classes.php loads and it is actually a form and its action is now set to itself. So when this form is posted, it loads classes.php instead of example.html. Please say how to correct it?
 

  1.   <script type="text/javascript">

    $(function() {
    $("#tabs").tabs({
    ajaxOptions: {
    error: function(xhr, status, index, anchor) {
    $(anchor.hash).html("Couldn't load this tab. We'll try to fix this as soon as possible. If this wouldn't be a demo.");
    }
    }
    });
    });
    </script>











  2.  <li>
    <a href="class.php">Classes</a>
    </li>