Form submits when user presses enter on any field - how do I stop this

[Laura2]

I have created a form that updates a database when the user submits. The problem is that my fields are not validated and don't need to be. When the user presses enter anywhere on the form, it automatically brings them to the confirmation page. How do I prevent this from happening and make the submit button the only one that can go to the confirmation page? I do not want to make my other fields mandatory.

Thanks in advance for your help.

Laura.