<script type="text/javascript">   
  $('span.forumViewed').each(function (i, g) {   
     $.get($(this).parent().find('a.forum').attr('href'), function (data) {   
      g.innerHTML = '[' + $('td.forumOnlineBar:first', data).html().replace('$USERNAME$', '') + ']';   
     });   
  });   
  </script>