js 验证 身份证号

// 构造函数，变量为15位或者18位的身份证号码
function clsIDCard(CardNo) {
  this.Valid = false;
  this.ID15 = '';
  this.ID18 = '';
  this.Local = '';
  if (CardNo != null)
    this.SetCardNo(CardNo);
}




// 设置身份证号码，15位或者18位
clsIDCard.prototype.SetCardNo = function(CardNo) {
  this.ID15 = '';
  this.ID18 = '';
  this.Local = '';
  CardNo = CardNo.replace(" ", "");
  var strCardNo;
  if (CardNo.length == 18) {
    pattern = /^\d{17}(\d|x|X)$/;
    if (pattern.exec(CardNo) == null)
      return;
    strCardNo = CardNo.toUpperCase();
  } else {
    pattern = /^\d{15}$/;
    if (pattern.exec(CardNo) == null)
      return;
    strCardNo = CardNo.substr(0, 6) + '19' + CardNo.substr(6, 9)
    strCardNo += this.GetVCode(strCardNo);
  }
  this.Valid = this.CheckValid(strCardNo);
}
// 校验身份证有效性
clsIDCard.prototype.IsValid = function() {
  return this.Valid;
}
// 返回生日字符串，格式如下，1981-10-10
clsIDCard.prototype.GetBirthDate = function() {
  var BirthDate = '';
  if (this.Valid)
    BirthDate = this.GetBirthYear() + '-' + this.GetBirthMonth() + '-'
        + this.GetBirthDay();
  return BirthDate;
}
// 返回生日中的年，格式如下，1981
clsIDCard.prototype.GetBirthYear = function() {
  var BirthYear = '';
  if (this.Valid)
    BirthYear = this.ID18.substr(6, 4);
  return BirthYear;
}
// 返回生日中的月，格式如下，10
clsIDCard.prototype.GetBirthMonth = function() {
  var BirthMonth = '';
  if (this.Valid)
    BirthMonth = this.ID18.substr(10, 2);
  if (BirthMonth.charAt(0) == '0')
    BirthMonth = BirthMonth.charAt(1);
  return BirthMonth;
}
// 返回生日中的日，格式如下，10
clsIDCard.prototype.GetBirthDay = function() {
  var BirthDay = '';
  if (this.Valid)
    BirthDay = this.ID18.substr(12, 2);
  return BirthDay;
}


// 返回性别，1：男，0：女
clsIDCard.prototype.GetSex = function() {
  var Sex = '';
  if (this.Valid)
    Sex = this.ID18.charAt(16) % 2;
  return Sex;
}


// 返回15位身份证号码
clsIDCard.prototype.Get15 = function() {
  var ID15 = '';
  if (this.Valid)
    ID15 = this.ID15;
  return ID15;
}


// 返回18位身份证号码
clsIDCard.prototype.Get18 = function() {
  var ID18 = '';
  if (this.Valid)
    ID18 = this.ID18;
  return ID18;
}


// 返回所在省，例如：上海市、浙江省
clsIDCard.prototype.GetLocal = function() {
  var Local = '';
  if (this.Valid)
    Local = this.Local;
  return Local;
}


clsIDCard.prototype.GetVCode = function(CardNo17) {
  var Wi = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1);
  var Ai = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
  var cardNoSum = 0;
  for (var i = 0; i < CardNo17.length; i++)
    cardNoSum += CardNo17.charAt(i) * Wi[i];
  var seq = cardNoSum % 11;
  return Ai[seq];
}


clsIDCard.prototype.CheckValid = function(CardNo18) {
  if (this.GetVCode(CardNo18.substr(0, 17)) != CardNo18.charAt(17))
    return false;
  if (!this.IsDate(CardNo18.substr(6, 8)))
    return false;
  var aCity = {
    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"
  };
  if (aCity[parseInt(CardNo18.substr(0, 2))] == null)
    return false;
  this.ID18 = CardNo18;
  this.ID15 = CardNo18.substr(0, 6) + CardNo18.substr(8, 9);
  this.Local = aCity[parseInt(CardNo18.substr(0, 2))];
  return true;
}


clsIDCard.prototype.IsDate = function(strDate) {
  var r = strDate.match(/^(\d{1,4})(\d{1,2})(\d{1,2})$/);
  if (r == null)
    return false;
  var d = new Date(r[1], r[2] - 1, r[3]);
  return (d.getFullYear() == r[1] && (d.getMonth() + 1) == r[2] && d
      .getDate() == r[3]);
}
/*
 * 关于调用
 * $("#cardNo").blur(function(event){
    var idCard = $(this).val();
    
    var checkFlag = new clsIDCard(idCard);    
    if( !checkFlag.IsValid() ){
      alert("身份证错误");
      return false;
    }else{
      alert( "出生于: " + checkFlag.GetBirthDate() +" 地区:" + checkFlag.GetLocal() +" sex:" + checkFlag.GetSex() );
    }    
  });
 * 
 * 
 * */