Need help with bratta scrolling script

I downloaded the script and installed it into DMX.
My problem is that my website is aligned center. There is no way to tell where the top and left placement will be. Is it possible, or does it need exact pixel placement? if so....how?

Thanks.

The scroll script needs exact pixel placement, but you can center by using JavaScript to determine the screen width and height. This site will help you accomplish exactly what you want:

http://www.dansteinman.com/dynduo/en/widthheight.html