How to displaying advert after first post, 15th post and 29th post?

[kh99]

Well, I think spinball has 30 posts per page and wanted the ads to show up on each page. But now that I think about it, you could use ($post[postcount] % 30). And I think that is a better solution especially since it looks like the 'counter' variable isn't used if you're using threaded or hybrid mode to view the thread.