How to create jQuery functions?
<p>I have seen a few different approaches to create jQuery(-namespaced) functions, but I cannot quite tell the actual difference between them.</p>

<p><code>jQuery.fn.myFunction = function() { ... };</code></p>

<p><code>jQuery.myFunction = function() { ... };</code></p>

<p><code>jQuery.fn.extend({ myFunction: function() { ... } });</code></p>
