helper.php

<?php
/**
 * Helper class for Hello World! module
 * 
 * @package    Joomla.Tutorials
 * @subpackage Modules
 * @link http://docs.joomla.org/J3.x:Creating_a_simple_module/Developing_a_Basic_Module
 * @license        GNU/GPL, see LICENSE.php
 * mod_helloworld is free software. This version may have been modified pursuant
 * to the GNU General Public License, and as distributed it includes or
 * is derivative of works licensed under the GNU General Public License or
 * other free or open source software licenses.
 */
 
 // No direct access
defined('_JEXEC') or die;

class modBaccessibilityHelper
{
    /**
     * Retrieves the hello message
     *
     * @param   array  $params An object containing the module parameters
     *
     * @access public
     */    
    public static function getAjax()
    {
        jimport('joomla.application.module.helper');
		$input  = JFactory::getApplication()->input;
		$module = JModuleHelper::getModule('baccessibility');
		$params = new JRegistry();
        $params->loadString($module->params);
        return json_encode( $params );
    }
}