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.
So, does jotform support custom JS? How would i go about using it?
You would need to download the full source code if you want to make any major changes to the way forms work. To do that go to Embed Form and select the Source icon, then click the "here" link.
If you're doing this already then please post the address of the page and we can take a better look for you.