Using Dojo and Dijit in the portlet

I made changes in the ValidationCacheSamplePortlet that i built in the last section to demonstrate how to use dojo and dijit in the portlet. As you can see i am including Dojo 1.3.2 from AOL CDN

<%@page language="java" contentType="text/html; charset=ISO-8859-1"
  pageEncoding="ISO-8859-1" session="false"%>
<%@taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet"%>

<style type="text/css">
      @import src="http://o.aolcdn.com/dojo/1.3.2/dijit/themes/tundra/tundra.css";
      @import src=""http://o.aolcdn.com/dojo/1.3.3/dojo/resources/dojo.css";
</style>
 <script type="text/javascript" src="http://o.aolcdn.com/dojo/1.3.2
/dojo/dojo.xd.js" djConfig="parseOnLoad:true">
</script>
<portlet:defineObjects />
<script type="text/javascript">
dojo.require("dijit.form.Button");
dojo.require("dojo.parser");
</script>

<button dojoType="dijit.form.Button" id="btn">Resource
        <script type="dojo/method" event="onClick">
      dojo.xhrGet({
            url: "<portlet:resourceURL/>",
            load: function(data, ioargs){
               dojo.byId("resourceResponse").innerHTML = data;
            },
            error: function(error,ioargs){
               alert(error);
            }
         });  
        </script>
</button>

<div id="resourceResponse" />