function PrevLink()
 {
     $link = parent::PrevLink();
     if ($link && isset($_REQUEST['FileSearch'])) {
         return $link . '&FileSearch=' . $_REQUEST['FileSearch'];
     }
     return $link;
 }
	public function PrevLink()
	{
		$start = ($this->start - $this->pageSize < 0)  ? 0 : $this->start - $this->pageSize;
		return parent::PrevLink() ? $this->RelativeLink(array('start' => $start)) : false;
	}