if(!/^\d{17}(\d|x)$/i.test(ID)) return false;
// \d  匹配数字
// ^  匹配开始
// $  匹配结尾
// i  不区分大小写
// {17} 匹配17次
// \d|x 匹配数字或x

if(city[ID.substr(0,2)] === undefined) return "非法地区";

var birthday = ID.substr(6, 4) + '/' + Number(ID.substr(10, 2)) + '/' + Number(ID.substr(12, 2));
var d = new Date(birthday);
var newBirthday = d.getFullYear() + '/' + Number(d.getMonth() + 1) + '/' + Number(d.getDate());
var currentTime = new Date().getTime();
var time = d.getTime();
if(time >= currentTime || birthday !== newBirthday) return '非法生日';
// 获取身份证的年月日，然后再 new 一个 Date，再对比这两个日期是否一致
// 这里用Number()主要是因为身份证的日期是带0的，而new Date()出来的日期是不带0的，Number()之后就都不带0了

var arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
var arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
var sum = 0, i, residue;
for(i=0; i<17; i++) {
 sum += ID.substr(i, 1) * arrInt[i];
}
residue = arrCh[sum % 11];
if (residue !== ID.substr(17, 1)) '非法证号';

<script>
 function checkID(ID) {
  if(typeof ID !== 'string') return '非法字符串';
  var city = {11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"};
  var birthday = ID.substr(6, 4) + '/' + Number(ID.substr(10, 2)) + '/' + Number(ID.substr(12, 2));
  var d = new Date(birthday);
  var newBirthday = d.getFullYear() + '/' + Number(d.getMonth() + 1) + '/' + Number(d.getDate());
  var currentTime = new Date().getTime();
  var time = d.getTime();
  var arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
  var arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
  var sum = 0, i, residue;
 
  if(!/^\d{17}(\d|x)$/i.test(ID)) return '非法身份证';
  if(city[ID.substr(0,2)] === undefined) return "非法地区";
  if(time >= currentTime || birthday !== newBirthday) return '非法生日';
  for(i=0; i<17; i++) {
   sum += ID.substr(i, 1) * arrInt[i];
  }
  residue = arrCh[sum % 11];
  if (residue !== ID.substr(17, 1)) return '非法身份证哦';
 
  return city[ID.substr(0,2)]+","+birthday+","+(ID.substr(16,1)%2?" 男":"女")
 }
</script>