Where does JQuery call setInterval for .fadeIn and .fadeOut()?
<p>Here is a <a href="http://james.padolsey.com/jquery/#v=1.6.2&amp;fn=jQuery.fn.fadeIn" rel="nofollow">source viewer</a> for fadeIn() but it does not link out to custom() for some reason.</p>

<p>Also, as a second question, how does one conceptualize all this code...there are so many function calls that I can't even guess as to how much code actually runs when you call .fadeIn() or .fadeOut().</p>

<p>For example:</p>

<p><code>fadeIn()</code> calls <code>animate()</code> which calls <code>speed()</code> which calls <code>extend()</code>...</p>

<p>As a third question: is this object oriented programming ?</p>

<p>Thanks.</p>
