This application demonstrates various offline capabilities.
Download the Sencha Touch SDK from here and place the unzipped directory, renamed to touch, into the lib folder.
This should ensure that the <link> and <script> tags in the index.html of the application itself point to the correct locations for the JavaScript and CSS resources:
<script src="lib/touch/sencha-touch.js" type="text/javascript"></script>
<link href="lib/touch/resources/css/sencha-touch.css" rel="stylesheet" type="text/css" />
You should then be able to test that the application works by opening the index.html file in a WebKit desktop browser. To try the application on a mobile simulator (or real handset), you will have to deploy this directory onto a local (or external) web server.