15位和18位身份证JS校验的简单实例

var idCardNoUtil = {
 /*省,直辖市代码表*/
 provinceAndCitys: {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"},

 /*每位加权因子*/
 powers: ["7","9","10","5","8","4","2","1","6","3","7","9","10","5","8","4","2"],
 
 /*第18位校检码*/
 parityBit: ["1","0","X","9","8","7","6","5","4","3","2"],

 /*性别*/
 genders: {male:"男",female:"女"},

 /*校验地址码*/
 checkAddressCode: function(addressCode){
   var check = /^[1-9]\d{5}$/.test(addressCode);
   if(!check) return false;
   if(idCardNoUtil.provinceAndCitys[parseInt(addressCode.substring(0,2))]){
    return true;
   }else{
    return false;
   }
 },

 /*校验日期码*/
 checkBirthDayCode: function(birDayCode){
   var check = /^[1-9]\d{3}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))$/.test(birDayCode);
   if(!check) return false;  
   var yyyy = parseInt(birDayCode.substring(0,4),10);
   var mm = parseInt(birDayCode.substring(4,6),10);
   var dd = parseInt(birDayCode.substring(6),10);
  var xdata = new Date(yyyy,mm-1,dd);
  if(xdata > new Date()){
   return false;//生日不能大于当前日期
  }else if ( ( xdata.getFullYear() == yyyy ) && ( xdata.getMonth () == mm - 1 ) && ( xdata.getDate() == dd ) ){
   return true;
  }else{
   return false;
  }
 },
 
 /*计算校检码*/
 getParityBit: function(idCardNo){
  var id17 = idCardNo.substring(0,17);  
   /*加权 */
   var power = 0;
   for(var i=0;i<17;i++){
    power += parseInt(id17.charAt(i),10) * parseInt(idCardNoUtil.powers[i]);
   }       
   /*取模*/ 
   var mod = power % 11;
   return idCardNoUtil.parityBit[mod];
 },
 
 /*验证校检码*/
 checkParityBit: function(idCardNo){
   var parityBit = idCardNo.charAt(17).toUpperCase();
   if(idCardNoUtil.getParityBit(idCardNo) == parityBit){
     return true;
   }else{
     return false;
   }
 },

 /*校验15位或18位的身份证号码*/
 checkIdCardNo: function(idCardNo){
  //15位和18位身份证号码的基本校验
  var check = /^\d{15}|(\d{17}(\d|x|X))$/.test(idCardNo);
  if(!check) return false;
  //判断长度为15位或18位 
  if(idCardNo.length==15){
    return idCardNoUtil.check15IdCardNo(idCardNo);
  }else if(idCardNo.length==18){
    return idCardNoUtil.check18IdCardNo(idCardNo);
  }else{
    return false;
  }
 },

 //校验15位的身份证号码
 check15IdCardNo: function(idCardNo){
   //15位身份证号码的基本校验
   var check = /^[1-9]\d{7}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))\d{3}$/.test(idCardNo);  
   if(!check) return false;
   //校验地址码
   var addressCode = idCardNo.substring(0,6);
   check = idCardNoUtil.checkAddressCode(addressCode);
   if(!check) return false;
   var birDayCode = '19' + idCardNo.substring(6,12);
   //校验日期码
   return idCardNoUtil.checkBirthDayCode(birDayCode);
 },

 //校验18位的身份证号码
 check18IdCardNo: function(idCardNo){
   //18位身份证号码的基本格式校验
   var check = /^[1-9]\d{5}[1-9]\d{3}((0[1-9])|(1[0-2]))((0[1-9])|([1-2][0-9])|(3[0-1]))\d{3}(\d|x|X)$/.test(idCardNo);
   if(!check) return false;
   //校验地址码
   var addressCode = idCardNo.substring(0,6);
   check = idCardNoUtil.checkAddressCode(addressCode);
   if(!check) return false;
   //校验日期码
   var birDayCode = idCardNo.substring(6,14);
   check = idCardNoUtil.checkBirthDayCode(birDayCode);
   if(!check) return false;
   //验证校检码  
   return idCardNoUtil.checkParityBit(idCardNo);  
 },

 formateDateCN: function(day){
    var yyyy =day.substring(0,4);
    var mm = day.substring(4,6);
    var dd = day.substring(6);
    return yyyy + '-' + mm +'-' + dd;
 },

 //获取信息
 getIdCardInfo: function(idCardNo){
   var idCardInfo = {
    gender:"",  //性别
    birthday:"" // 出生日期(yyyy-mm-dd)
   };
  if(idCardNo.length==15){
    var aday = '19' + idCardNo.substring(6,12);
    idCardInfo.birthday=idCardNoUtil.formateDateCN(aday);
    if(parseInt(idCardNo.charAt(14))%2==0){
      idCardInfo.gender=idCardNoUtil.genders.female;
    }else{
      idCardInfo.gender=idCardNoUtil.genders.male;
    }   
  }else if(idCardNo.length==18){
    var aday = idCardNo.substring(6,14);
    idCardInfo.birthday=idCardNoUtil.formateDateCN(aday);
     if(parseInt(idCardNo.charAt(16))%2==0){
      idCardInfo.gender=idCardNoUtil.genders.female;
    }else{
      idCardInfo.gender=idCardNoUtil.genders.male;
    } 
    
  }
  return idCardInfo;
 },
 
 /*18位转15位*/
 getId15: function(idCardNo){
  if(idCardNo.length==15){
    return idCardNo;
  }else if(idCardNo.length==18){
    return idCardNo.substring(0,6) + idCardNo.substring(8,17); 
  }else{
  return null;
  }
 },
 
 /*15位转18位*/
 getId18: function(idCardNo){
  if(idCardNo.length==15){
    var id17 = idCardNo.substring(0,6) + '19' + idCardNo.substring(6);
    var parityBit = idCardNoUtil.getParityBit(id17);
    return id17 + parityBit;
  }else if(idCardNo.length==18){
    return idCardNo;
  }else{
  return null;
  }
 }
};

//身份证号码验证  
jQuery.validator.addMethod("idCardNo", function(value, element) { 
  return this.optional(element) || idCardNoUtil.checkIdCardNo(value); 
}, "Please specify a valid ID number."); 

//获取身份证信息 
var idCardInfo = idCardNoUtil.getIdCardInfo(idCardNo); 
alert(idCardInfo.gender + "|" + idCardInfo.birthday); 

注：录入并判断数据库中是否已存在同样的身份证时 
(1) 若输入的是15位的身份证：先查找15位的ID是否存在，若不存在还需要将15位的身份证转成18位的身份证，仍不存在的话才可录入系统。 
(2) 若输入的是18位的身份证：先查找18位的ID是否存在，若不存在还需要将18位的身份证转成15位的身份证，仍不存在的话才可录入系统。 
如果找到对应的15位身份证，需要将15位的更新到18位。