So to get a simple example running, it's as easy as:
<script type="text/javascript" src="../adapter/ext/ext-base.js"></script> <script type="text/javascript" src="../ext-all.js"></script> <link rel="stylesheet" type="text/css" href="../resources/css/ext-all.css"/> <script> Ext.onReady(function() { Ext.Msg.alert('Ext', 'Hello world!'); }); </script>
...and you should see this: