Image Viewer--Programmable Position

[Bunk]

I implemented the CSS Popup Image Viewer at
http://www.dynamicdrive.com/style/csslibrary/item/css-popup-image-viewer/

When I compared its function to the thumbnail viewer at

http://www.pfaltzgraff.com/on/demandware.store/Sites-Pfaltzgraff-Site/default/Search-ShowCategories?cgid=patterns

in their section "Our Top Five Patterns" dishes, I found that when I do a mouseover the thumbnails, their images displayed as expected, but when I hovered over thumbnails close to the right side of the page their displayed images changed positions to keep from being displayed off the right side of the page.

How can I implement their automated position feature?
Thanks,
Bunk

[Cybril]

I have a strange problem with this script as well - it won't work as expected on a Windows server! I've never heard of different servers having problems with html/css, only browsers, but here it is on a Linux server:

http://cybril.com/dd_new.html

and here it is on a Windows server:

http://centerstageranch.com/dd_new.html

Anyone have any ideas?