Forum Ad after every sixth post

[محروم.كوم]

Hello
I want to put an ad after every 6 post, to be shown only if the split page has 9 posts.
This code:
Code:


works OK, but only for first page.
If i split my pages on every 20 posts and the thread has 27 posts, the ad will be shown on second page. But on second split page are only 7 posts - i don't want to show it.



Please, help with code. __DEFINE_LIKE_SHARE__