In ajax call how to pass the data in a string format

display: function (data) {
                 var Customer_No = data.record.CustomerNo;
                 var client_Name = data.record.ClientName;
                 $schemaEditor = $('<span>Edit</span>');
                 $schemaEditor.click(function () {
                     var currentId = $(this).data('Customer_No');
                     var data;
                     $.ajax({
                         url: _app.ApplicationURL.BaseURL + "Apps/CSTBibleMaster/Index",
                         type: 'GET',
                         dataType: 'html',
                         data: { CustomerNo: Customer_No, ClientName: client_Name },
                         success: function (data) {
                             ShowValidationMessages(data, 'Bible Master History', 1000, 400);
                         }
                     });
                 });
                 return $schemaEditor;
             }
         }