Auto form fill

[crowriter]

I am developing a web site for a club. Part of this will be a printable subscription form, to make life easy (not necessarily for me at the moment) is for applicants to select their country of residence with a java form, and have the membership fee due automatically appear in another box.
Can anyone point me in the direction of an appropriate script. I've got one but as soon as I increase the number of contries in the array list the box disappears from the page.

Mike

[requestcode]

Can you post your code or a link to it? Maybe we can see what the problem is.