Rule number 1 when working with forms:
- All Form processing must occur on the forms action page.
The action of the form on your index page is to post to the conformation page:
The seerver validation behavor needs to be added to the action page.
goes through adding validation to your form pages, it uses the example of a checkout page that posts to a confirm page, use that tutorial for an example of adding validation to a form that posts to another page.