<script type="text/javascript" language="javascript">          
e=document.getElementsByTagName("TD");          
for(k=15; k<e.length;k++) {          
if(e[k].className=='posttdMessage') {          
s=e[k].innerHTML;          
while (s.indexOf('[ p.s.]') != -1){          
s=s.replace('[ p.s.]','<fieldset><legend><font style="font-size: 10px; font-family: Verdana; color: red;"> P.S.</font></legend><font style="font-size: 11px; font-family: Verdana; color: red;">'); s=s.replace('[ /p.s.]','</font></fieldset>');          
e[k].innerHTML=s;          
}          
} }          
</script>

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