Which ad tag is required for floating ads and expandable banners?

by Aaron DelloIacono Thies

The use of rich media which can leave the "boundary" of the defined ad space must be called using the Javascript type of ad tag.

Other ad tags which also support rich media through the use of IFRAMEs will not be able to display such floaters or expandables because an IFRAME will constrain the rich media to the IFRAME only, preventing its visibility on your web page.