layDate设置开始日期选择框和结束日期选择框 之间的相互验证方法

var startDate = laydate.render({
            elem: '#_select_start_date',  //结束日期框的ID
            type: 'date',
            done: function (value, date) {
                if(value!==""){
                    endDate.config.min = {
                        year:date.year,
                        month:date.month-1,
                        date: date.date
                    }
                }else
                {
                    endDate.config.min = {
                        year:"1098",
                        month:"1",
                        date: "1"
                    }
                }
            },
            trigger: 'click'
        });
        var endDate = laydate.render({
            elem:'#_select_end_date',  //结束日期框的ID
            type:'date',
            done:function(value,date){
                if(value!==""){
                    startDate.config.max={
                        year:date.year,
                        month:date.month-1,
                        date: date.date
                    };
                }else {
                    startDate.config.max={
                        year:"3019",
                        month:"1",
                        date: "1"
                    };
                }
            },
            trigger: 'click'
        });