title: Add scrollbar to html
body: <p>I have a popup window that with the following source code ("likes.php"):</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
      &lt;title&gt;Like&lt;/title&gt;
    &lt;meta content="text/html;charset=utf-8" http-equiv="Content-Type"&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;ol&gt;
      &lt;?php for($i=0;$i&lt;500;$i++){ ?&gt;
      &lt;li&gt;&lt;p&gt;&lt;?php echo $i ?&gt;&lt;/p&gt;&lt;/li&gt;
      &lt;?php } ?&gt;
  &lt;/ol&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Now the problem is that although all the paragraphs are created, I can't see them, because there is no scrollbar. How can I attach a scrollbar to my page? </p>
  
  <p><a href="http://snag.gy/xDK7l.jpg" rel="nofollow">Link to printscreen</a>  </p>
  
  <p>It is working on chrome, but not in firefox <strong>IF</strong> it comes in a popup window (other file calls window.open("likes.php"). Works in both browsers in regular windows.</p>