title: How to sum of hours (hh:mm:ss) in jquery?
body: <p>How to sum of hours (<code>hh:mm:ss</code>) in jquery?</p>
  
  <p>For Ex. :
  I need to sum of <code>40:50:40</code> hours and <code>04:12:30</code> hours in jQuery.</p>
  
  <p>And result should be                           </p>
  
  <pre><code>45:03:10
  </code></pre>