public function init() { parent::init(); $element = new Zend_Form_Element_Checkbox('useExisting'); $element->setRequired(true); $element->setValue(1); $element->setLabel('Use existing image:'); $this->useExisting = $element; $this->addElement('hidden', 'existingFilename', array('required' => true, 'ignore' => false, 'decorators' => array('ViewHelper'))); }