eventCountByDate: function (drugKeyword) {
              var url = '&search=receivedate:[20140601+TO+20150101]&count=receivedate';
              if (drugKeyword)
                  url = '&search=(receivedate:[20140601+TO+20150101]+AND+(patient.drug.openfda.brand_name:' + encodeURIComponent(drugKeyword) + '+patient.drug.openfda.substance_name:' + encodeURIComponent(drugKeyword) + '))&count=receivedate';