<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>