hi guys, visit this site http://www.yulia-nau.de/eng.htm

notice the navigation bar?
okay, when u first enter the site, after its full loaded, wait for about 5 secs, then try to move your mouse right-left, left-right, on the navigation bar.

See the cool effect on top? where the images of the lady moves around, very SMOOTHLY, according to your mouse.

Now, how they do that ??

Thanks, guys!