title: Unable to get property 'queryselectorall' of undefined or null reference
body: <p>I am getting below mentioned error in my jQuery function:</p>
  <pre><code>var timer = document.getElementById(id);
  var pdays = timer.querySelector('.days');
  var phours = timer.querySelector('.hours');
  var pminutes = timer.querySelector('.minutes');
  var pseconds = timer.querySelector('.seconds');
  </code></pre>
  <blockquote>
  <p><strong>0x800a138f - JavaScript runtime error: Unable to get property 'querySelector' of undefined or null reference</strong></p>
  </blockquote>
  <p>Please suggest to me where I can find <strong>jQuery file</strong> for <code>.queryselectorall()</code> method or remove above mentioned error in jQuery code ?</p>