title: How to copy and output text from another textbox with Javascript?
body: <pre><code>&lt;input type="hidden" id="prevTicketNo" value="6"/&gt;
  
  &lt;script&gt;
    var ticketNo = document.getElementById(prevTicketNo).value +1;
    document.getElementById('currentTicketNo').value = ticketNo;
  &lt;/script&gt;
  
  &lt;input id="currentTicketNo" value=""/&gt;
  </code></pre>
  
  <p>What I am trying to do:
  The prevTicketNo is a value captured from somewhere else. I need that to load as a hidden field so I used type="hidden". Once the value in this textbox is loaded, I need to +1 so that the number increases for my current ticket.</p>
  
  <p>Is the right approach?</p>