Add a couple fields to an .ASP checkout page

We have a site [login to view URL] when you place an order you get taken to the checkout page. On that page there is a form to fill out, and personal credit card info to fill out. We need to add the following fields to that form: 1.) We need to add an extra credit card # field, to verify that they entered it correctly 2.) We need to add an extra field to capture the credit card CSV code (the 3 digit security code on the back) The site is in .asp