How can I add a blank email field?

I want the user to be able to enter any email address they need at the time.

For example, we use a form for hours, so I'd like each person to be able to email the form to themselves, in addition to the auto response email. 

Thank you for your help.

You can add as many email fields as you want to in your form: 

And create another autoresponder to be sent to that email field: http://www.jotform.com/help/26-Creating-a-Form-Autoresponder

Let us know if you need anything else, we will be glad to assist you.