Hola Aijoona, si, es este:
Código HTML:
Ver original<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" href="../../ext-4.0.2a/resources/css/ext-all.css" />
<script type="text/javascript" src=" https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js"></script> <script type="text/javascript" src="../../ext-4.0.2a/ext-all.js"> </script>
<!-- uso el método ready() de jquery y coloco adentro el código extJs -->
<script type="text/javascript"> $(function(){
var win = new Ext.Window({
title:'Hola mundo',
width:250,
height:250,
minimizable:true,
maximizable:true
});
win.show();
});