JS/JQUERY（23）—— 身份证校验的方法

//证件验证的方法
  var vcity = ['11', '12', '13', '14', '15', '21', '22', '23', '31', '32', '33', '34', '35', '36', '37', '41', '42', '43', '44', '45', '46', '50', '51', '52', '53', '54', '61', '62', '63', '64', '65', '71', '81', '91']
  //检查号码是否符合规范，包括长度，类型
  var isCardNo = function (card) {
    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
    var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
    return reg.test(card);
  };
  //取身份证前两位,校验省份
  var checkProvince = function (card) {
    var province = card.substr(0, 2);
    return vcity.indexOf(province) >= 0;
  };
  //检查生日是否正确
  var checkBirthdayId = function (card) {
    var len = card.length;
    var ereg;
    //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
    if (len == '15') {
      if ((parseInt(card.substr(6, 2)) + 1900) % 4 == 0 || ((parseInt(card.substr(6, 2)) + 1900) % 100 == 0 && (parseInt(card.substr(6, 2)) + 1900) % 4 == 0 )) {
        ereg = /^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$/;//测试出生日期的合法性
      } else {
        ereg = /^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/;//测试出生日期的合法性
      }
      if (ereg.test(card)) {
        return '19' + card.substr(6, 2) + '-' + card.substr(8, 2) + '-' + card.substr(10, 2);
      } else {
        return false;
      }

    }
    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    else if (len == '18') {
      if (parseInt(card.substr(6, 4)) % 4 == 0 || (parseInt(card.substr(6, 4)) % 100 == 0 && parseInt(card.substr(6, 4)) % 4 == 0 )) {
        ereg = /^[1-9][0-9]{5}(20|19)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$/;//闰年出生日期的合法性正则表达式
      } else {
        ereg = /^[1-9][0-9]{5}(20|19)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/;//平年出生日期的合法性正则表达式
      }
      if (ereg.test(card)) {
        return card.substr(6, 4) + '-' + card.substr(10, 2) + '-' + card.substr(12, 2);
      } else {
        return false;
      }
    } else {
      return false;
    }
  };
  //检查性别
  var checkSex = function (card) {
    var sexShow;
    if (card.length == '15') {
      sexShow = card.slice(14, 15) % 2 ? '1' : '2';
      return sexShow;
    }
    else if (card.length == '18') {
      sexShow = card.slice(16, 17) % 2 ? '1' : '2';
      return sexShow;
    } else {
      return false;
    }
  };
  //校验位的检测
  var checkParity = function (card) {
    //15位转18位
    card = changeFivteenToEighteen(card);
    var len = card.length;
    if (len == '18') {
      var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
      var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
      var cardTemp = 0, i, valnum;
      for (i = 0; i < 17; i++) {
        cardTemp += card.substr(i, 1) * arrInt[i];
      }
      valnum = arrCh[cardTemp % 11];
      return valnum == card.substr(17, 1);
    }
    return false;
  };
  //15位转18位身份证号
  var changeFivteenToEighteen = function (card) {
    if (card.length == '15') {
      var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
      var arrCh = new Array('1', '0','X', '9', '8', '7', '6', '5', '4', '3', '2');
      var cardTemp = 0, i;
      card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6);
      for (i = 0; i < 17; i++) {
        cardTemp += card.substr(i, 1) * arrInt[i];
      }
      card += arrCh[cardTemp % 11];
      return card;
    }
    return card;
  };

  function validIdCard(value) {
    return (isCardNo(value)&&checkProvince(value)&&checkBirthdayId(value)&&checkSex(value)&&checkParity(value));
  }