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.

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    CAPTCHA and Javascript

    Asked by afterfive on June 28, 2012 at 09:17 PM


    I have a few questions regarding the CAPTCHA check and javascript on your forms.

    1. Am I correct in understanding that your forms don't run server-side validation - so if javascript is disabled no validation is used?

    2. When javascript is disabled, the CAPTCHA image does not display - just the loading GIF is shown. Is this normal functionality? This virtually prevents the form from being submitted at all if javascipt isn't active which is potentially very confusing to visitors. Especially considering the viewer is sent to a page containing just the CAPTCHA field which will still only display the loading animation.

    3. If a form is submitted with an incorrect CAPTCHA entry (or submitted at all with javascript disabled) the form is replaced with just the CAPTCHA field asking for another entry.  While I would like to avoid this page and instead have an error message show on the actual form, I'd like to know if it's possible to style that CAPTCHA field on that page. The problem I have is that it uses black text for the field label and, against the dark background of my site, it is virtually unreadable. 


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    JotForm Support

    Answered by jonathan on June 29, 2012 at 12:20 AM


    You are correct in that, a disabled javascript in your browsers will simply make the jotform forms not to function normally or as intended. Simply put, enabled javascript in the browser is required to properly interpret the form functions.

    Please note that a disabled javascript in browsers will have varying results for the form function on different systems and OS combinations... so, it is not easy to conclude on a fix outcome.

    As is now, there is no known method in JotForm out-of-the-box to modify or alter the style of the Captcha field. The captcha field creation was fixed and is a result of backend code.

    Hope this help. Please inform us if you have other inquiry.