PushDown Ads and Fixed Panel Ads

We want to be able to incorporate some of the newer ad format like the Pushdown ad format (970 wide by 66 tall that expadns on page load to push all the other content down) and the Fixed Panel (336 wide x 700 tall banner that floats on the screen) in a fixed position.

From what I know of coding the Fixed Panel design could perhaps be done on its own solely with the javacript/rich media coding of the ad. Correct me if I’m wrong.

The Pushdown ad however seems like it would have to be coded along with the html of the site. Does anyone have any direction on how to get the pushdown ads integrated into a site?

My best guess…
generally ads have some javascript or other scripting to make them appear/hide. Wrap that in a div with a unique ID or CLASS then set the attributes for that ID in CSS, you can use Absolute positioning vs Relative positioning to do what you want. The ads may even have classes defined that you can control.