title: How to get the number of DOM elements used in a web page
body: <p>Using jQuery I can easily get the number of DOM elements used by a web page:</p>
  <pre><code>$('*').length;
  </code></pre>
  <p>But not all web sites are using jQuery.</p>
  <p>So my question is: How do I get the number of DOM elements used in a web page using pure JavaScript and js console.</p>