I've just implemented the jQuery UI sortable plugin for a set of images. The markup I have is as follows:

<ul id="images" class="ui-sortable">
  <li id="7884029"><img src="/images/member/4698568/7884029_t.jpg" alt="" /></li>
  <li id="7379458"><img src="/images/member/4698568/7379458_t.jpg" alt="" /></li>
  <li id="1704208"><img src="/images/member/4698568/1704208_t.jpg" alt="" /></li>
  <li id="1750715"><img src="/images/member/4698568/1750715_t.jpg" alt="" /></li>
  <li id="4364912"><img src="/images/member/4698568/4364912_t.png" alt="" /></li>
</ul>

<script type="text/javascript">
/*<![CDATA[*/
jQuery(function($) {
  jQuery('#images').sortable({'delay':'100'});
});
/*]]>*/
</script>

The LI id is the 'name' column in the DB table - I prefer not to display the ID column.

Now my question is how do I capture the sorting? I understand this would be an AJAX request but I have no idea how to do it. I have set up a sort_order column in my DB table and I am using PHP as my scripting language. I could do with a code example.

EDIT:

Ideally I prefer if the sort order is applied upon moving an item, i.e. I do not want to enclose it all in a form.