Expandable flash banners

hey guys -

i have to make a banner that expands over the website it sits in to reveal more content. i’ve never made one before so i was wondering a few things.

  1. is there anything special i’d have to do to the flash to make it work?

  2. it looks like the banner sits in a css layer that’s over top the rest of the site, is that correct?

this is a terrible example but the banner at the top of this page shows what i’m talking about: http://www.pointroll.com/AdGallery/CW_NetworkOnLorem/lorem.asp

thanks! :kir: