Changing some simple script.

I need someone to change the script on

http://www dot diamonddrinks dot de/sortiment

In both Firefox and Chrome the products unfold when those headings are clicked but we just realised that it is not working with Internet Explorer and the guy who did it for us says he would be too busy to change it. So I need someone to change it for us. Pm me your prices. Has to be finished by tonight.

Can you send me another way of contact you? i cannot send pm's yet