Inheritance - Class.extend()
<p>The author of the presentation <a href="http://www.slideshare.net/rmurphey/building-large-jquery-applications" rel="nofollow">here</a> uses a construct <code>Class.extend()</code>, starting from slide no. 14</p>

<p>Is this coming from any specific library? Or is the author using <a href="http://ejohn.org/blog/simple-javascript-inheritance/" rel="nofollow">this</a> implementation?</p>
