$("#datebox1").datebox('calendar').calendar({
        validator:function(beginDate){
            var date = new Date();//今天
            var dateStartTime = new Date(date.getTime() - 30 * 24 * 3600 * 1000);//獲取當前時間30天前時間
            dateStartTime = new Date(dateStartTime);
            return beginDate < date  &&  beginDate > dateStartTime;
        }
    });
    $("#datebox1"
 
).datebox({
        onSelect:function(beginDate){
            $('#datebox2').datebox().datebox('calendar').calendar({
                validator:function(endDate){
                    var date = new Date();
                    return beginDate <= endDate && endDate < date;
                }
            });
        }
    });