public function init()
{
$translator = \Zend_Registry::get('container')->getService('translator');
$this->addElement('text', 'headline', array('label' => $translator->trans('Headline', array(), 'article_images'), 'required' => true));
$this->addElement('select', 'rendition', array('label' => $translator->trans('Slideshow rendition', array(), 'article_images'), 'required' => true));
$this->addElement('submit', 'submit', array('label' => $translator->trans('Create', array(), 'home'), 'ignore' => true));
}