/**
* Renders the callback client scripts.
*/
public function render($writer)
{
$this->getPage()->getClientScript()->registerPradoScript('ajax');
if ($this->_control->getVisible(false)) {
parent::render($writer);
} else {
$writer->write("<span id=\"" . $this->_control->getClientID() . "\" style=\"display:none\"></span>");
}
}