Gallery not working in IE9

[alisondesign]

I made a site for someone a good few years back using the frog.js gallery (http://www.dynamicdrive.com/dynamici...ogjs/index.htm) but this is no longer working in IE9 (although appears to be working in other browsers). Does anyone have any suggestions as to how I can fix this? Or alternatively can suggest a better gallery which works in a similar way? I really appreciate your help, as I am not a javascript expert so wouldn't know where to start. Many thanks, Alison