Overlapping flash banner using Java?

Hi guys,

I’ve been trying to work this out for ages! Does anyone know how to create flash banners that overlap or move other content on a web page or extend outside their normal swf dimensions? [URL=“http://observer.guardian.co.uk/magazine/”]

I’ve also seen adds like this that move the rest of the pages content down as when they are rolled over. Could this be a combination of flash and java? This would be very useful for the project I am currently working on! Any help or suggested tutorial would be very much appreciated. Thanks in advance