Warning: Exception caught by form: Cannot render jQuery form element without at least one decorator implementing the 'ZendX_JQuery_Form_Decorator_UiWidgetElementMarker' interface. Default decorator for this marker interface is the 'ZendX_JQuery_Form_Decorator_UiWidgetElement'. Hint: The ViewHelper decorator does not render jQuery elements correctly.

$form = new Form_Job();
$form->setDecorators(Decorator::$formDecorators);
$form->setElementDecorators(Decorator::$elementDecorators);
$form->getElement('submit')->setDecorators(Decorator::$buttonDecorators);

class Form_Job extends ZendX_JQuery_Form {
   public function init() {
        $element = new ZendX_JQuery_Form_Element_DatePicker('date_from');
        $element->setLabel('Campaign Period From :');
        $element->setRequired(true);
        $element->setAttrib('size', '10');
        $element->setJQueryParam('dateFormat', 'yy-mm-dd');

        $this->addElement($element);
   }
}

public static $formJQueryElements = array(
        array('UiWidgetElement', array('tag' => '')), // it necessary to include for jquery elements
        array('Errors'),
        array('Description', array('tag' => 'span')),
        array('HtmlTag', array('tag' => 'td')),
        array('Label', array('tag' => 'td', 'class' =>'element')),
        array(array('row' => 'HtmlTag'), array('tag' => 'tr')),
);
$form->getElement('jq_date')->setDecorators(Decorator::$formJQueryElements);