Using image insted of dropdown menu?

Hi,

I found this script on JSKIT and I was wondering if it was possible to edit it so insted of having a drop down menu I can use an image to open the links,because i have a View Picture Button and wanted to use it insted of the drop down menu options.This is the script:

http://www.javascriptkit.com/script/script2/popimage.shtml

Thanks for the help

Mick