<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>