What to do I do with this Run Active Javascript file

I’m building this website in AS2, and I decided to get a premade contact form. I’ve got it funtioning fine. The problem:

I already have a RunActiveJava file on my server, and the email form comes with one as well. If I copy this file to my server, wont it just copy over what is currently on it? And wont this cause problems for what was connected to that original runactivejava file?

Please help as I no little

thanks