I'm trying to hide/disable field when the user select an option (Example at images). 


Image A
[![enter image description here][1]][1]
Image B
[![enter image description here][2]][2]

I've tried to used AJAX, JS or #states from Drupal 7, and it works, but when the user press "Submit" and the "Validate" method throws a "form set error", the selected item does not correspond to the status of the fields (Disable/Hide). It takes the default values from $form element definition. Is there any way to do it? Thanks for comment and help!


  [1]: https://i.sstatic.net/nHim2.png
  [2]: https://i.sstatic.net/IpMyd.png