Hide/Show content on sidemenu

[eluser]Kamy[/eluser]
Hi:

I have a pretty simple template that displays the data. It has a header, content, sidemenu and footer section.
The items in the sidemenu are the same throughout the website, ie facebook link, google ads, etc...

But now we want to display certain items on some pages only. For example we want google ads box to appear only on products page.
Or a jukebox to appear on albums page only (within the sidemenu).

How would I go about doing this?

Thanks