Help with PHP code for banners

[Prince]

I am using this code in my postbit template:

PHP Code:

<if condition="$post[postcount] == 10">
banner code here
</if> 

I want an IF statement where the defining number displays the banner code after every 10th post not just post number 10, or whatever I change that number to.

Thanks!

[ForumsMods]

<vb:if condition="$post['postcount'] % $vboptions['maxposts'] == '10'">
banner code here 
</vb:if>

[Prince]

thanks!

--------------- Added [DATE]1267471374[/DATE] at [TIME]1267471374[/TIME] ---------------

one more question, how can I change that code so the banner appears after EVERY 10 posts rather than just after the 10th post?

Thanks