/**
* Creates the captcha element.
*
* @return Zend_Form_Element
*/
protected function createCaptcha()
{
$captcha = new Zend_Form_Element_Captcha($this->captchaOptions);
if ($this->getOption('generateId', false)) {
// Generate a unique element ID to avoid clashes if two
// captchas are rendered on the same page.
$captcha->setAttrib('id', $captcha->getId() . '-' . uniqid());
}
return $captcha;
}