if(idTypeIsChecked.checked == true){
   //如果选中的是二代身份证        var birthDateValue = document.getElementById('idNumber').value;                var birthYear = birthDateValue.substr(6, 4);    //截取年        var birthMonth = birthDateValue.substr(10, 2);    //截取月        var birthDay = birthDateValue.substr(12, 2);    //截取日                var date = new Date();        var year = date.getFullYear();//获取系统当前年        var month = date.getMonth()+1;//获取系统当前月并+1        var today = date.getDate();//获取系统当前日                if(birthDateValue && birthDateValue != "" && birthDateValue.length == 18){            if(birthYear > year || (year - birthYear) > 150 || birthMonth > 12 || birthDay > 31){
   //如果自动生成了非法的出生日期，出生日期将设置为当前系统日期                birthYear = year;                                if(month < 10){                    month = "0"+month;//如果小于0则前面补0                }                birthMonth = month;                                if(today < 10){                    today = "0"+today;//如果小于0则前面补0                }                birthDay = today;            }            document.getElementById('birthDate').value = birthYear+"-"+birthMonth+"-"+birthDay;        }    }