conditional ad after 5th, 15th post

[scottkoz20]

hmmm - well, I thought it was flawless

when I use the following code (want to do this after post 3, 6 and 10 (I have 3 different plugins) - it is adding addition ads onto the Private Message Inbox in between the message and the Quick Reply section.

I already have 1 add that exist, it's adding 1 for each plugin

not sure how to put in the Not PM page(s) into this code (or to array the posts) as I could remove the Ad code for the PM's and allow this handle it

global $ids; 

$excluded = array(88,115); 

if (!is_member_of($vbulletin->userinfo, $excluded) AND $post['postid'] == $ids[2]) 
{ 
    $template_hook['postbit_end'] .= '<center>AD CODE</center>'; 
}