How'd they do this, (on resize window, the picture is always in a certain place)

I was wondering how they do this here: http://www.fallon.co.uk :: like when you resize the window, the plant picture and the menu move to the edge of screen no matter how big or small you resize the window. Any idea on how it was done? .fla + html would be nice :hugegrin:

-thanks

quickie edit: How did they do this with easing also? It’s fine without but easing looks better than without.