var dates = {//定义的对象
    year:now.getFullYear(),
    month:now.getMonth()+1,
    date:now.getDate(),
    hour:now.getHours(),
    minute:now.getMinutes(),
    second:now.getSeconds()
}

//开始遍历循环
var val;
for (val in dates){
    console.log('对象名称：'+val+'-对象的值：',dates[val])
}

结果：