1) Script Title: Lightbox 2.04a

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...box2/index.htm
3) Describe problem: In Firefox, the pop-up containing the image appears halfway down the page, not centre screen as it does in IE. So that if you have a very long page it is necessary to scroll down until the image is found. This can mislead viewers into thinking the pop-up has failed to work.
How can I make Firefox display the pop-up centre screen?