How to copy fields to another 'field'

Hi all,
How can I copy the value from one field into another field by clicking on a 'copy field' button? (Using chronoforms of course)

It's similar to when you have a billing address and want to copy the info to the shipping address.

Thanks,
Steve

Hi Steve,

Probably a button and a JavaScript snippet . . . the easy way is to find a site than has one and see how they do it.

Bob