Firefox - IE problems with portfolio pop ups from a guide

Hello,

First of all thanks for reading… Im a young designer working on my portfolio website, this site has helped me a great deal with its guides… neway to the question;

My Website www.th3designs.co.uk

Each TV (apart from a broken one) has a pop-up window which loads a section of work. This works fine with firefox but sadly the pop-ups dont load in IE. The script i used to load the pop-up can be found at:

http://www.kirupa.com/developer/mx/centered_popup.htm

I would really appreciate if anyone could help me with the code or point me in the right direction and as always with design time is of the essence! (is this the right forum section?)

Cheers,
Tom

***EDIT also any criticism and advice about my site is always welcome! ty