send a copy to the customer

I would like to send a copy to my customer of the form that will send to me by email. how can i do this?

My customer go to my website, fill the form, and send. when he send to me i want to send a copy to him automatically. I can create a field to the customer enter the email.

These are our guides on setting up email notifications.  The first is on setting up notifications sent to you:

http://www.jotform.com/help/25-Setting-Up-Email-Notifications

The second is how to setup notifications to your users:

http://www.jotform.com/help/26-Creating-a-Form-Autoresponder