title: unsafeWindow is not defined
body: <p>My code is: </p>
  
  <pre><code>var $ = unsafeWindow.$, jQuery = $;
  $('head').append('&lt;link type="text/css" href="http://twitterchat.p.ht/chatstyle.css" rel="stylesheet" charset="utf-8"&gt;&lt;script type="text/javascript" src="http://twitterchat.p.ht/wp-content/plugins/envolve-chat/envolve_api_client.php" charset="utf-8"&gt;&lt;/script&gt;&lt;script type="text/javascript" src="http://twitterchat.p.ht/wp-content/plugins/envolve-chat/envolve-chat.php" charset="utf-8"&gt;&lt;/script&gt;');
  </code></pre>
  
  <p>But the problem is that it has one error.
  I need help with this script.
  I'm new on javascript.</p>
  
  <p>Thanks.</p>