easyui combobox onSelect事件

easyui combobox 没有onchange事件，只有onSelect事件
 1 $(function () {
     $('#Select6').combobox({
         onSelect: function (record) {
             var jsonMap = { "year": record.pkey };
             $.ajax({
                 url: "getYearHandler.ashx?action=getdata",
                 type: "post",
                 data: jsonMap,
                 datatype: "json",
                 success: function (data) {
                     var obj = eval('(' + data + ')');
                     dosomething(obj);
                 }
             });
         }
     });
 });