js 验证 身份证号

idCard.js

// 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]);

}

jsp页面

function valiIdCard(idCard){

  var checkFlag = new clsIDCard(idCard);

  if (!checkFlag.IsValid()) {

   alert("输入的身份证号无效,请输入真实的身份证号！");

   document.getElementByIdx("idCard").focus();

   return false;

  }else{

   return true;

  }

 }

<TR>
             <TD height=50 align="center">身份证件号：</TD>
             <TD align=left>
               <INPUT style="WIDTH: 75%; height:30px" name="sfzjh" id="sfzjh" value=""
 onblur="valiIdCard(this.value)"  >
             </TD> 
           </TR>