Welcome to the board, itchy Historically, the browse button has been quite resistant to changes in appearance, since it's basically hardwired into the client's OS. However, this is the old story, and I haven't looked into it lately. Things have been changing.
There is a very thorough FAQ on forms and Javascript at [developer.irt.org...]
I looked through it, and didn't spot the exact info you need (although some of it comes close.) But this is a VERY big bunch of information, and you may want to double check me.