need help in sending data from formmail.asp to user who fills out form

The script I use for mail processing is formmail.asp
You can find it at this link:
[url]http://www.building-envelope.net/formmail.txt[/url]

My question is in a generic html form, I need whoever fills out the form, to also receive a copy of the data they filled out, as soon as they hit the submit button. You can find the generic form at this link:
[url]http://www.building-envelope.net/form.html[/url]

I know I need to add
“email address” and make it a required field, but how do I get them to receive it, as well as the customer?

Thanks for your help.

Also in #HTML _↴