ajaxcontextswitch_fail.php

<?php
class FooController extends Zend_Controller_Action {

    public function init() {
        $ctx = $this->_helper->getHelper('AjaxContext');
        $ctx->addActionContext('render', 'html')
            ->initContext();
    }

    public function renderAction() {
        
        if ($this->_request->isXmlHttpRequest()) {
            echo 'WHAT?';
            return;
        }

    }

}
?>