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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    Здравствуйте! Мне необходимо сделать в форме строку ИНН, где будет заложена прове

    Asked by Светлана on August 18, 2013 at 12:58 AM

    То есть, если пользователь написал большее или меньшее количество, то форма сообщает ему об ошибке и не отправляет всю форму. Возможно ли это сделать с помощью вашей формы. И еще вопрос, сообщает ли форма пользователю об ошибках заполнения (капчи, обязательных полей и т.д.)

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    JotForm Support

    Answered by Tasha on August 18, 2013 at 11:39 AM


    I was unable to understand exactly what you are asking. It would help if you could provide some more information on what you would like.

    I did however, get that you would like to know if you can validate the entry or to make a field required. To answer that question Jotform gives you the option to mark a field as required and to also validate a specific field with the tools provided in the interface.


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    Answered by webpakatan on August 18, 2013 at 02:58 PM


    Хочу пояснить, что мне нужно.

    Мне нужно, чтобы в поле ИНН разрешалось написать только 10 цифр. Я поставила в настройках максимальное число 10.  А минимальное как поставить? Можно это сделать? Чтобы посетитель правильно написал число из 10 цифр. 

    Если напишет десять цифр, форма отправится. Если меньше - выйдет ошибка

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    JotForm Support

    Answered by jonathan on August 18, 2013 at 05:10 PM

    @ webpakatan

    Hi, from what I can see in your form http://www.jotform.co/form/32290790512855, you seem to have correctly set this already.

    The VAT number field is now currently set to only 10 character allowed.



    Please inform us if you need further assistance.


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    Answered by webpakatan on August 19, 2013 at 05:00 AM


    Да 10 символов разрешено  - это работает. Но пользователь же может ошибиться и написать 9,8, 7, .... символов. И форма не воспримет это как ошибку.

    Надо, чтобы меньше 10 тоже нельзя было отправить

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    JotForm Support

    Answered by Welvin on August 19, 2013 at 11:34 AM


    Good day! Unfortunately, there is currently no way you can define minimum characters within our Text Box field. What you can do to achieve that is to get your form source codes (How to Get Form Source Codes) then add a custom Javascript that would set a minimum limit of characters within the mentioned text box field.

    This method will also require you to embed the modified source. 

    I've made exactly what you want, get the modified codes here: http://pastebin.com/dYCBaM4V

    Output: https://shots.jotform.com/welvin/pages/webpakatan-minimu-limit-characters.html