True vertical centering is a print concept that doesn't translate well to the web. Finding absolute center requires knowing
a) height of the surrounding space and
b) height of content to be centered.
In print it's easy because you know the precise dimensions of the media your working with. On the web it's nearly impossible because your media is device & user centric. The browser's horizontal & vertical viewing space can be anything and everything in between.
If you try to restrict web page height with explicit values in order to arrive at an absolute center, you will invariably create a boat load of usability problems for your site visitors. The penalty is often worse than the reward.
Aesthetically there's nothing wrong with adding a margin-top: value px to your .jTscrollerContainer. However, test your page in multiple devices to ensure that your most important content doesn't drop "below the fold."
Vertical Centered Demo.
http://alt-web.com/TEMPLATES/vertical-center.html
Nancy O.
Alt-Web Design & Publishing
Web | Graphics | Print | Media Specialists
http://alt-web.com/
