|(Click image to view demo)|
The IAB Sidekick is an innovative ad format that starts out from an in-page banner and pushes the page over to reveal additional content when expanded. While displaying a large side panel, it keeps the original webpage easily accessible. The Flash files below will show you how a Sidekick with a 300x250 in-page display that expands into a 850x700 panel is built.
logic & source code
The source code has been made available for your reference.
View code here