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.
Unfortunately we do not have such feature to display the thank you message and then redirect to another URL.
Please be noted that with a little workaround it is possible to achieve your requirement. You will have to create a custom thank you page to display the thank you message. In this page, you can add custom script to redirect users to different URL. You may like to take a look at the following guide which should help you: http://www.jotform.com/help/89-Create-a-Custom-Thank-you-page-with-Auto-redirect
Hope this helps.
Do get back to us if you have any questions.