设置时间laydate 结束时间大于开始时间

layui.use(['form', 'laydate'], function(){
        var form = layui.form;
        var laydate = layui.laydate;
        //日期范围
        var startDate=laydate.render({
            elem: '#start_time',
            type: 'datetime',
            max:"2099-12-31",//设置一个默认最大值
            done: function(value, date){
                endDate.config.min ={
                    year:date.year,
                    month:date.month-1, //关键
                    date: date.date,
                    hours: 0,
                    minutes: 0,
                    seconds : 0
                };
            }
        });
        var endDate= laydate.render({
            elem: '#end_time',//选择器结束时间
            type: 'datetime',
            min:"1970-1-1",//设置min默认最小值
            done: function(value,date){
                startDate.config.max={
                    year:date.year,
                    month:date.month-1,//关键
                    date: date.date,
                    hours: 0,
                    minutes: 0,
                    seconds : 0
                }
            }
        });
});