title: Assign value to hidden textarea onSubmit
body: <p>I have two <code>textarea</code> fields, the first one is hidden and the second is visible, My question is how can I assign the content of the visible one to the hidden when the submit button is clicked?</p>
  
  <p>Any suggestion? don't matter (<strong>Javascript</strong> or <strong>Jquery</strong>) the both will help.</p>