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.

  • Profile Image

    What is the best way to include a computed input field in my form?

    Asked by ggrodsky on December 10, 2011 at 08:14 AM

    My form includes the Full Name quick tool and an email (could be a test box) field.  I want the emal field to always be automatically filled with <first letter of first name><last name><@myDomain>

    On hand written forms, I did this using javascript and OnBulr functions, as well as setting the email field at read_only.

    I could download the form and edit it manually, but then I loose the ability to update the form on your website.

    Is there a way to do what I whant using your tool?

    Page URL:

  • Profile Image

    Answered by pinoytech on December 10, 2011 at 03:41 PM

    Hi ggrodsky,


    Sorry for the inconvenience. As of now, jotform doesn't have autofill function base on other fields. The best way is to download the full source code and cutomize it in anyway you want.

    Thank you for using Jotform. Hope this information willl help you.



  • Profile Image
    JotForm Support

    Answered by idarktech on December 10, 2011 at 03:52 PM


    Glad to hear that pinoytech provided you some information. Right now, the only best way to achieve that is to download the form's full source code.

    Yes, it will no longer update your form as you are using your form's source code. What I can suggest is, finalize your form in JotForm, download your form's source code and then customize.

    If you have further questions, please let us know. Thank you for using JotForm and have a great day!