/**
  * The default action - show the home page
  */
 public function getmembershiplimitAction()
 {
     $request = $this->getRequest();
     $membership_type = $request->getParam('membership_type');
     $document_type = $request->getParam('document_type');
     if ($membership_type) {
         $membershipLimit = Lib_Model_DbTable_MembershipLimit::getMembershipLimits($membership_type, $document_type);
         if ($membershipLimit) {
             $this->_helper->json($membershipLimit);
         } else {
             $this->getResponse()->setHttpResponseCode(400);
             echo '"' . $membership_type . '" is not a valid membership type.';
         }
     }
 }