Add not applicable to all empty input fields on submit
<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>
