title: Load frame, only after clicking over "Load" button
body: <p>I want the <code>iframe</code> to load only when the load button is pressed.</p>
  
  <pre><code>&lt;html&gt;
      &lt;body&gt;
          &lt;iframe src="page.html" id="push_frame"&gt;
  Frames are not supported.
          &lt;/iframe&gt;
          &lt;button id="load_frame"&gt;
              Load
          &lt;/button&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Usually this needs some sort of JavaScript to solve. How can I implement this?</p>