PHP or jQuery in a form. I am working on something that was coded a long time ago. There is a registration form that takes your first, last and email. They want to integrate a mailing list manager and need to pass, first_name, last_name and email in the form. However, the form has customer_first_name, customer_last_name and customer_email. I can not change the form names because they are used all over the place in the code. Is there a way to create a hidden input field that will auto populate with the first name, last etc... so that the form fields are there for the email mailing list api?