Say I had a page that was very long, and i didn't want people to only see the ads if they're at the top of the page. Is there anything in the TOS that prohibits placement in a <div> that slides down the page as the user scrolls?
I don't have a URL yet, i haven't implemented it. But I just found one site doing it: http://www.cssplay.co.uk/layouts/fixed.html It's really no different that putting the ad in a frame at the left...
what if a nav bar was alos in that div, as in it was just a standard element at the left, and the ads were there as well?
I think your best bet would be to email Google and ask, possibly show them the example that you posted here.