레이유이 시간제어를 클리어 후 정상적으로 사용할 수 없는 문제

var start = {
istime: true,
format: 'YYYY-MM-DD hh:mm:ss',
max: '2099-06-16 23:59:59',
istoday: true,
choose: function (datas) {
end.min = datas; //开始日选好后，重置结束日的最小日期
}
};
var end = {
istime: true,
format: 'YYYY-MM-DD hh:mm:ss',
max: '2099-06-16 23:59:59',
istoday: true,
choose: function (datas) {
start.max = datas; //结束日选好后，重置开始日的最大日期
}
};
document.getElementById('start_time').onclick = function () {
start.elem = this;
laydate(start);
};
document.getElementById('end_time').onclick = function () {
end.elem = this;
laydate(end);
};

layui.use([ 'laydate'], function(){
var $ = layui.$;
var laydate = layui.laydate;
var nowTime = new Date().valueOf();
var max = null;
var start = laydate.render({
elem: '#start_time',
type: 'datetime',
max: nowTime,
btns: ['clear', 'confirm'],
done: function(value, date){
endMax = end.config.max;
end.config.min = date;
end.config.min.month = date.month -1;
}
});
var end = laydate.render({
elem: '#end_time',
type: 'datetime',
max: nowTime,
done: function(value, date){
if($.trim(value) == ''){
var curDate = new Date();
date = {'date': curDate.getDate(), 'month': curDate.getMonth()+1, 'year': curDate.getFullYear()};
}
start.config.max = date;
start.config.max.month = date.month -1;
}
});

type: 'datetime', 是带时分秒的 date 是不带时分秒的

layui.use('laydate', function(){
   /* lay('.layui-input').each(function(){
  laydate.render({
    elem: this
    ,trigger: 'click'
    ,change: function(value, date, endDate){
    console.log(value); //得到日期生成的值，如：2017-08-18
    console.log(date); //得到日期时间对象：{year: 2017, month: 8, date: 18, hours: 0, minutes: 0, seconds: 0}
    console.log(endDate); //得结束的日期时间对象，开启范围选择（range: true）才会返回。对象成员同上。
    }
  });
});  */
var $ = layui.$;
    var laydate = layui.laydate;
   var nowTime = new Date().valueOf();
    var max = null;
       var start = laydate.render({
        elem: '#start_time',
        type: 'datetime',
        btns: ['clear', 'confirm'],
        done: function(value, date){
            endMax = end.config.max;
            end.config.min = date;
            end.config.min.month = date.month -1;
        },
        change: function(value, date, endDate){
        var timestamp2 = Date.parse(new Date(value));
timestamp2 = timestamp2 / 1000;
            end.config.min = timestamp2;
            end.config.min.month = date.month -1;
    }
    });
    var end = laydate.render({
        elem: '#end_time',
        type: 'date',
        done: function(value, date){
        console.log(" ======  "+date);
            if($.trim(value) == ''){
                var curDate = new Date();
                date = {'date': curDate.getDate(), 'month': curDate.getMonth()+1, 'year': curDate.getFullYear()};
            }
            start.config.max = date;
            start.config.max.month = date.month -1;
        }
    });
});