<script type="text/javascript">    
  e=document.getElementsByTagName("TD");        
  for(k=15; k<e.length;k++) {        
  if(e[k].className=='posttdMessage') {        
  s=e[k].innerHTML;        
  while (s.indexOf('[T_able]') != -1){        
  s=s.replace('[T_able]','<table width="100%" border="0" cellspacing="0" cellpadding="5" style="background-color:#111111; border-top:1px dotted #898989; border-right:1px dotted #898989; border-bottom:1px dotted #898989; border-left:1px dotted #898989;"><tr><td style="width:40px; height:5px; background-image: url(/img/bbcode/123.png); background-repeat:no-repeat; background-position:5px 3px;"> </td><td><font style="font-size: 11px; font-family: Verdana; color: #898989;">'); s=s.replace('[/Table]','</font></td></tr></table>');        
  e[k].innerHTML=s;        
  }        
  } }        
  </script>

<input type="button" accesskey="y" value="Table" onclick="simpletag('Table','','','message',''); return false;" class="codeButtons" title="Вставить таблицу" name="Table">