easyui combobox onSelect事件

easyui combobox 沒有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);
                }
            });
        }
    });
});