title: Add not applicable to all empty input fields on submit
body: <p>I’d be very grateful with any help. I’m trying to add <code>‘not applicable’</code> to any empty input fields that are not relevant within section/s of a form on submit. Sections of the form get disabled/hidden depending on selection/s hence why I would like to achieve the below effect</p>
  
  <p>My target is...</p>
  
  <pre><code>question: “Not Applicable” 
  question 2:” Not Applicable” and so forth but not 
  
  “question:           “  in the recipients email
  </code></pre>
  
  <p>I'm using the latest jQuery library and the validation plugin.
  Thanks in advance</p>