<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>