demo:
http://cfviet.co.cc/index.htm

code:
Tim đoạn code này trong index_body

Code:

<!-- BEGIN disable_viewonline -->
..............
<!-- END disable_viewonline -->

thay bằng

Code:

<!-- BEGIN disable_viewonline -->
<!-- what's going on box -->
<script type="text/javascript">var num= 0;</script>
<table class="forumline" width="100%" border="0" cellspacing="1" cellpadding="0">
  <tr id="currenttr" onClick="i= 0; e=this.parentNode.childNodes; while(++i<e.length) if(e[i].tagName=='TR') e[i].style.display=(e[i].style.display=='none')?'':'none'; retour=(my_getcookie(this.id)=='true')?'false':'true'; my_setcookie(this.id,retour, 1, 0);"  style="cursor:pointer;">
      <td class="tcat" colspan="2"><a href="/viewonline.htm">Tình hình diễn đàn</a></td></tr>

<tr>
      <td class="alt2" colspan="2">
<table class="forumline" width="100%" border="0" cellspacing="1" cellpadding="0">
 
<tbody>
  <tr>
      <td class="thead" colspan="2">
        <a style="float:right" href="#top"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/reputation.gif" alt="" border="0" /></a>
Ai đang online ?
      </td>
  </tr>

</tbody>


<tbody id="collapseobj_forumhome_stats" style="">
  <tr>
      <td class="alt2"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/whos_online.gif" border="0"></td>
      <td class="alt1" width="100%">
      <span class="gensmall">{TOTAL_USERS_ONLINE}<br>
{RECORD_USERS}<br><br>
{LOGGED_IN_USER_LIST}
      </td>
  </tr>
</tbody>
<tbody>
  <tr>
      <td class="thead" colspan="2">
        <a style="float: right;" href="#top"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/reputation.gif" alt="" border="0"></a>
Thành viên truy cập gần đây:
      </td>
  </tr>
</tbody>

<tbody id="collapseobj_forumhome_stats" style="">
  <tr>
      <td class="alt2"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/stats.gif" alt="Thành viên" border="0"></td>
      <td class="alt1" width="100%">
      <table id="cfviet" class="smallfont">{L_CONNECTED_MEMBERS}
{L_WHOSBIRTHDAY_TODAY}{L_WHOSBIRTHDAY_WEEK}</table>
<script type="text/javascript">
document.getElementById('cfviet').innerHTML=document.getElementById('cfviet').innerHTML.replace(/Members connected during last 99 hours :/,'Thành viên truy cập trong 24 giờ:').replace(/Users having a birthday today :/,'Thành viên có sinh nhật hôm nay:').replace(/Users with a birthday within the next 10 days:/,'Thành viên có sinh nhật trong 10 ngày tới:').replace(/No users have a birthday today/,'Không thành viên nào có sinh nhật ngày hôm nay.');
</script>
      </td>
  </tr>
</tbody>
<tbody>
  <tr>
      <td class="thead" colspan="2">
        <a style="float: right;" href="#top"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/reputation.gif" alt="" border="0"></a>
Thống kê diễn đàn:
      </td>
  </tr>
</tbody>

<tbody id="collapseobj_forumhome_stats" style="">
  <tr>
      <td class="alt2"><img src="http://i913.photobucket.com/albums/ac332/battuvuong/cfviet/stats-1.gif" border="0"></td>
      <td class="alt1" width="100%">
<span class="gensmall">{TOTAL_POSTS}<br>
{TOTAL_USERS}<br>
{NEWEST_USER}</span>
      </td>
  </tr>
</tbody>

  <tr>
      <table class="tborder" cellpadding="6" cellspacing="1" border="0" width="100%" align="center">
<!-- BEGIN switch_chatbox_activate -->
  <tr>
      <td id="chatcf">
        {TOTAL_CHATTERS_ONLINE} :  {CHATTERS_LIST}
</td>
            <td><!-- BEGIN switch_chatbox_popup -->
            <div id="chatbox_popup"></div>
            <td>{disable_viewonline.U_FRAME_CHATBOX}</td>
<td>[<a href="/html-h158.htm?reload" rel="nofollow">Tham gia chat</a>]</td>
            <!-- END switch_chatbox_popup --></td><script type="text/javascript">
document.getElementById('chatcf').innerHTML=document.getElementById('chatcf').innerHTML.replace(/There are currently (.+) user\(s\) on the ChatBox/,'Hiện có $1 thành viên sử dụng Chatbox');
</script>
        </span>
     
  </tr>
  <!-- END switch_chatbox_activate --></table>
     
  </tr>
 

<tbody>
  <tr>
      <td class="tfoot" colspan="5" align="center"><div class="smallfont"><strong>
{GROUP_LEGEND}
      </strong></div></td>
  </tr>

</tbody>

</table></td></tr></table><script type="text/javascript"> document.getElementById('currenttr').id='trfrm'+num; if(my_getcookie('trfrm'+num)=='true') { i= 0; e=document.getElementById('trfrm'+num).parentNode.childNodes; while(++i<e.length) if(e[i].tagName=='TR')e[i].style.display='none'; } num++;</script>

Nguồn: chinhphuc