replace a message and not insertAfter
<p>i have this code that shows an html message after the upload, but i want to replace the messages and not accumulate a list of messages like:</p>

<p>valid image
invalid image
invalid format
success upload
....</p>

<pre><code>  $('#userfile').change(function() {
                $(this).upload('xxx.php', function(res) {
                    $(res).insertAfter(this);
                }, 'html');
            });
</code></pre>

<p>any idea?</p>

<p>thanks</p>
