I am having problems getting a certain piece of my design to work in both Netscape & IE.

If you look at http://www.beyondtheprint.com.au/galleries.asp it works in IE only ("works" means that when you select a gallery & choose a thumbnail, the full size image appears in a popup ( I know, but client request!) and everything is fine .... in Netscape you just get "The parameter is incorrect".

Most of the code is dynamically generated, but I can't seem to get the "let's pass the image name & caption to the popup" correct. The closest I can get is http://www.beyondtheprint.com.au/galleriesx.asp - can anyone see what I'm doing wrong ?