Image moves when user scrolls. [resolved]

I see that this site www.mettlercenter.com has a nice little feature that has its logo move when the user scrolls down the page. What is this called? Image Scrolling? And how do I create something like that? Is there any code out there that I can just cut and paste?

Thanks to all that reply.

Learn to use Google search for scripts sometime is helpful too :wave:

view source, its all there

http://www.google.com/search?q=javas...en-US:official

Thanks guys I managed to find what I needed.