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a fixed div would basically be achieving the same effect of a framed ad without actually using them
i am assuming that a flaoting box is one of those annoying boxes that popup over the content, a fixed div can be placed in the left or right hand side or the top or bottom giving the effect of a frame
I couldn't find anyone specifically finding that it wasn't allowed but maybe any updates to the TOS since then could clarify.
of course if it were placed in the same div/"frame" as a navigation menu or sidebar, it is not necessarily drawing attention to the ads.
that can be achieved through css
other examples of fixed header/footer/sidebars can be found on
Maybe I should simply rephrase the question as: "Has anyone had better success with framed ads over inline ads?"
Implementation aside of how to achieve the "framed" effect, I would assume that a better CTR could/would/should be achieved since there is no above the fold/below the fold problems to worry about.
I have had specific email conversations with Adsense support about this (because of a layout bug in a site) and as long as neither the ads nor the content can ever overlay each other, they are fine with it.
Just be really careful and test various browser/resolution combinations to make sure it can never overlay. IE has a particularly nasty bug for not creating horizontal scroll bars properly that caught one of my sites (the layout bug I was discusssing with them) and only occurred when someone windowed their browser to less than 60 pixels wide, but apparently someone out there surfs like that and complained about it using the adsense feedback form....
Best fixed layout I've seen (and used) uses negative margins on the main content. Switching to that fixed my original layout issue and made Adsense support happy with it.
In many sites, especially those with long content pages and/or fixed menus already, including the adsense ads there makes a lot of sense.
Nonetheless I remember at least one person who was specifically told that fixed divs were not acceptable. That may have been due to the ad block being superimposed over portions of the web page, but it wouldn't hurt to ask anyway (and tell us what they say).