/**
  * writeHeader - write the header of the output
  */
 function writeHeader()
 {
     $GLOBALS['HTML']->header(array('title' => _('Search')));
     parent::writeHeader();
 }
 /**
  * getNextResultsUrl - get the url to go to see the next results
  *
  * @return string url to next results page
  */
 function getNextResultsUrl()
 {
     return parent::getNextResultsUrl() . '&group_id=' . $this->groupId;
 }