What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Sorry to say, but we don't have such feature to achieve what you want in your form. However, a workaround that is something like this should do the trick: http://www.jotform.co/form/32743949205863
1. Edit your form
2. At the top of your form, add Text Box field (for password/code)
3. Create a Show/Hide condition
4. Save changes.
If you need further assistance, please let us know.