How can I pass a unique qualifier to an iframe on the thank you page?

I have added the widget for a unique id at the bottom of my form.  I need to pass that id to an iframe on the custom thank you page that I have created and redirect people to when they hit submit.  How can i do this?

A'm assuming that you would like to pass values from your form into our custom than you page.

The only thing you require to do, is capture the field ID and place it in the URL of your thank you page. Below is a sample on how to pass the fullname to your page.

In your Thank you page, you are require to create a script to capture this values and place it in a variable to be displayed

Send POST Data From JotForm Using PHP in Custom Thank You Page.