diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Controller/Action/Helper/AjaxContext.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Controller/Action/Helper/AjaxContext.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,77 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Controller
+ * @subpackage Zend_Controller_Action_Helper
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: AjaxContext.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Controller_Action_Helper_ContextSwitch
+ */
+require_once 'Zend/Controller/Action/Helper/ContextSwitch.php';
+
+/**
+ * Simplify AJAX context switching based on requested format
+ *
+ * @uses       Zend_Controller_Action_Helper_Abstract
+ * @category   Zend
+ * @package    Zend_Controller
+ * @subpackage Zend_Controller_Action_Helper
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Controller_Action_Helper_AjaxContext extends Zend_Controller_Action_Helper_ContextSwitch
+{
+    /**
+     * Controller property to utilize for context switching
+     * @var string
+     */
+    protected $_contextKey = 'ajaxable';
+
+    /**
+     * Constructor
+     *
+     * Add HTML context
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->addContext('html', array('suffix' => 'ajax'));
+    }
+
+    /**
+     * Initialize AJAX context switching
+     *
+     * Checks for XHR requests; if detected, attempts to perform context switch.
+     *
+     * @param  string $format
+     * @return void
+     */
+    public function initContext($format = null)
+    {
+        $this->_currentContext = null;
+
+        if (!$this->getRequest()->isXmlHttpRequest()) {
+            return;
+        }
+
+        return parent::initContext($format);
+    }
+}