/**
  * Link to a MerchantPage Filter
  * @param Int $merchantPageID
  * @param Boolean $fullLink
  * @return String (HTML)
  */
 function MerchantPageLink($merchantPageID, $fullLink = false)
 {
     $link = "";
     if ($fullLink) {
         $link .= "{$this->Link()}/?";
     }
     if ($merchantPageID) {
         $link .= "&" . AllMerchantsPage_Controller::get_merchant_page_param() . "=" . $merchantPageID;
     }
     return $link;
 }