在ajax成功success返回中判断返回的数据或者对象是否为空

/**
 * 查找提成的id
 * @param itmId
 * @param brcId
 */
var findTimeCardStaffList = function (itmId, brcId) {
    $.ajax({
        url: CONFIG.ROOT + CONFIG.URI.ORDER_DATA_YJ_STF,
        type: "post",
        async: false,
        data: {
            itmId: itmId,
            brcId: brcId
        },
        success: function (result) {
            var staffListMap = result.data;
            var selectHtml = '';
            if(isEmpty(staffListMap)){
                selectHtml += '';
                selectHtml += "" + '无' + "";
                selectHtml += "";
                $("#STF_ITEM_DROP").html(selectHtml);
                return;
            }

            for (var dpaId in staffListMap) {
                var staffList = staffListMap[dpaId];
                selectHtml += '';
                for (var i in staffList) {
                    var staff = staffList[i];
                    if(staff != null){
                        selectHtml += "" + staff.name + ""
                    }
                }
                selectHtml += "" + '无' + ""
                selectHtml += ""
            }
            $("#STF_ITEM_DROP").html(selectHtml);
        }
    })
}

**/**
 * 判断对象是否为空
 * @param obj
 * @returns {boolean}
 */
function isEmpty(obj){
    for(var o in obj){
        return false;
    }
    return true;
}
```**