How to make those fancy flash banners that expand beyond their box

I am building a flash banner, which needs at one stage to expand beyond its 728x90 box. Something similar to the Corei7 ad currently on wired.com but not as drastic. I know ads like that are annoying, but getting evicted in winter is not an option. Viewing source on pages are difficult since they are almost always wrapped up in some third party code so I am stuck.

If you can give any help I would appreciate it. I have been trying searches with different combinations on stackoverflow and google and I have not found the right combination of keywords that give me proper results.

tl;dr : Please tell me how to开发者_开发知识库 make a Flash banner that expands transparently beyond its 728x90 box upon user interaction.

---

You need some JavaScript on the outside that resizes the Flash movie. This JavaScript could be triggered using ExternalInterface.

---

You need to use windowless mode so that the browser renders the application. This allows you to see behind the embedded object and see the html components behind it.