public function act_search($user_filters = array())
{
$paramarray['fallback'] = array('search', 'multiple');
// Use the according preset defined in the Posts class
$default_filters = array('preset' => 'search');
$paramarray['user_filters'] = array_merge($default_filters, $user_filters);
$this->assign('criteria', $_GET['criteria']);
return $this->act_display($paramarray);
}