quick way to loose loyal visitors.

I refuse to visit sites that do this.

I would assume this would be against Adsense TOS, as it would fall under "drawing undue attention" to the ads.

I wouldn't do such a thing in any event, but if you do decide to do it, better run it by G first.

beware of things that float
you have been warned!

i would never use floating ads. for understanding: floating ads are the crap that keeps bucking after a scroll event - or these annoying navbars swinging behind. all coded with javascript. it looks completely unprofessional and lousy, but even respected well known websites use it for their navigation or ads.

however, what i use are fixed ads. ctr up, no below the fold problem anymore, no scrolling out of sight, ads stay visible and rock-steady all the time. perfect! with a little bit of pride i can say, that i've yet to see another site on the web which performs cross-browser fixed ad blocks *without* a frameset. there is nothing shady with it, unless you leave a large enough space for content scrolling. you could as well place your ad blocks in a non scrolling frame to achieve fixed positioning like some webmasters do. what you should not do is placing your fixed ad block in the content. the result would be a layer ad, that is like a pop up. so you should only place your fixed divs on the margin of the browser window.

but the trick is to do without a frameset and interior scroll bars. problem: internet explorer doesn't understand the css position:fixed attribute on divs. but for ie, there are at least two css hacks i know (which are surprisingly unnoticed). so fixed ads without frames and without interfering with the content are possible. indeed, they rule!