Repeat a form fields

Is this function available yet?  I need it, too.

You can achieve this with conditional logic to hide and show fields. You would need to create multiple field and then hide or shown them based on some condition. 

You can also use Configurable list widget or Dynamic Textbox, so your users will be able to dynamically add more fields.

Inside of this guide you can find out how to set up the Configurable List Widget:

http://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget 

If you have any other questions, please provide us ID of the form you are working on and provide us more details about what are you trying to achieve. 

Hope this will help. Let us know if you need further assistance.