How to add a google ads Sidebox only show product info page?

hello everybody!

I just have a question. How to add a google ads Sidebox only show product info page?

like this page:
http://www.cam-007.com/index.php?main_page=product_info&cPath=2&products_id=3

i want add a google adsence sidebox on left and right column, but there are only show on product info page, no the total page layout. like it work on http://www.cam-007.com/index.php?main_page=product_info&cPath=2&products_id=3 but it won't show on http://www.cam-007.com/index.php

how could i do?

could anyone help me? you just show me the code on \includes\modules\sideboxes\googeadsense.php, i just confused how to code it. thank you!

ok, i got it from Jack.

i just modify banner_box on \includes\modules\sideboxes\banner_box.php

find out
// test if box should display
$show_banner_box = true;

change to
// test if box should display
$show_banner_box = false;
if ($_GET["main_page"]=="product_info") {
$show_banner_box = true;
}

upload, and add google adscene code on banner box, it works well.