<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>