title: Creating instances of predefined objects in Javascript
body: <p>I know that in Javascript we can create ,instatnces of object like</p>
  
  <pre><code>var ins = new myObject();
  </code></pre>
  
  <p>I know that ,window ,document etc are predefined objects in javascript..Can we create new instances of these objects.?
  For  ex:<br>
  Is</p>
  
  <pre><code>var inss = new document();
  </code></pre>
  
  <p>possible?</p>