Simple question I think - full screen flash site

Could someone help me come up with this. I see a lot of flash site that are full screen, but acts like an html. In the website here, you can see how, when you scale the browser, the guy just gets closerto the scrolling area and the background kind goes away on the left.

anyways maybe if someone could redirect me to a tutorial or something like that. it would be great.

is it just a fscommand?