javascript ID card information verification regular expression

Many times we use a set of regular expressions to determine whether the ID card entered by the user is legal. Before using regular expressions to determine, the first thing to do is to verify the ID card information. Some validation rules

Many times we use a set of regular expressions to determine whether the ID card entered by the user is legal. Before using regular expressions to determine, the first thing to do is to verify the ID card information. Know some validation rules:

　1. Number structure

　The citizen identity number is a characteristic combination code, consisting of a seventeen-digit body code and a one-digit check code composition. The order from left to right is: six-digit address code, eight-digit date of birth code, three-digit sequence code and one-digit check code.

　 2. Address code (first six digits)

Indicates the administrative division code of the county (city, banner, district) where the permanent residence of the coding object is located, press gb/ The provisions of T2260 are implemented.

　3. Date of birth code (seventh to fourteenth digit)

Indicates the year, month and day of the birth of the coding object, and shall be implemented in accordance with the provisions of gb/T7408 , no separators are used between year, month, and day codes.

　4. Sequence code (15th to 17th digit)

It means that within the area identified by the same address code, the same year, the same month, the same People born on the same day are assigned sequential numbers, with odd numbers assigned to men and even numbers assigned to women.

　5. Check code (18th digit)

As the check code of the tail number, it is calculated by the number compilation unit according to a unified formula , if someone's tail number is 0-9, X will not appear, but if the tail number is 10, then X must be used instead, because if 10 is used as the tail number, then the person's ID card becomes 19th place. X is the Roman numeral 10. Using X to replace 10 can ensure that the citizen’s ID card meets national standards.

Then start getting to the point:

The first step is to write the error reporting rules:

var Errors = new Array("Verification passed!", "ID card number has incorrect digits!", "ID card number date of birth is out of range or contains illegal characters!", "ID card number verification error! "," Identity area illegal! ");

## This step 2, define a national matching object:

var area = { 
        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" 
      }

Step 3 , define the validation rules in 15-digit ID cards and 18-digit identities respectively:

switch (idcard.length) { 
        case 15: 
          if ((parseInt(idcard.substr(6, 2)) + 1900) % 4 == 0 || ((parseInt(idcard.substr(6, 2)) + 1900) % 100 == 0 && (parseInt(idcard.substr(6, 2)) + 1900) % 4 == 0)) { 
            ereg = /^[1-9][0-9]{5}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}$/; //测试出生日期的合法性 
          } else { 
            ereg = /^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/; //测试出生日期的合法性 
          } 
          if (ereg.test(idcard)) { 
            return Errors[0]; 
          } 
          else { 
            return Errors[2]; 
          } 
          break; 
        case 18: 
          if (parseInt(idcard.substr(6, 4)) % 4 == 0 || (parseInt(idcard.substr(6, 4)) % 100 == 0 && parseInt(idcard.substr(6, 4)) % 4 == 0)) { 
            ereg = /^[1-9][0-9]{5}(19|20)[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]$/; //闰年出生日期的合法性正则表达式 
          } else { 
            ereg = /^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/; //平年出生日期的合法性正则表达式 
          } 
          if (ereg.test(idcard)) { //测试出生日期的合法性 
            //计算校验位 
            S = (parseInt(idcard_array[0]) + parseInt(idcard_array[10])) * 7 + (parseInt(idcard_array[1]) + parseInt(idcard_array[11])) * 9 + (parseInt(idcard_array[2]) + parseInt(idcard_array[12])) * 10 + (parseInt(idcard_array[3]) + parseInt(idcard_array[13])) * 5 + (parseInt(idcard_array[4]) + parseInt(idcard_array[14])) * 8 + (parseInt(idcard_array[5]) + parseInt(idcard_array[15])) * 4 + (parseInt(idcard_array[6]) + parseInt(idcard_array[16])) * 2 + parseInt(idcard_array[7]) * 1 + parseInt(idcard_array[8]) * 6 + parseInt(idcard_array[9]) * 3; 
            Y = S % 11; 
            M = "F"; 
            JYM = "10X98765432"; 
            M = JYM.substr(Y, 1); //判断校验位 
            if (M == idcard_array[17]) return Errors[0]; //检测ID的校验位 
            else return Errors[3]; 
          } else return Errors[2]; 
          break; 
        default: 
          return Errors[1]; 
          break; 
      }

Final version:

function checkId(idcard) { 
      var Errors = new Array("验证通过!", "身份证号码位数不对!", "身份证号码出生日期超出范围或含有非法字符!", "身份证号码校验错误!", "身份证地区非法!"); 
      var area = { 
        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 retflag = false; 
      var idcard, Y, JYM; 
      var S, M; 
      var idcard_array = new Array(); 
      idcard_array = idcard.split(""); 
      //地区检验 
      if (area[parseInt(idcard.substr(0, 2))] == null) return Errors[4]; 
      //身份号码位数及格式检验 
      switch (idcard.length) { 
        case 15: 
          if ((parseInt(idcard.substr(6, 2)) + 1900) % 4 == 0 || ((parseInt(idcard.substr(6, 2)) + 1900) % 100 == 0 && (parseInt(idcard.substr(6, 2)) + 1900) % 4 == 0)) { 
            ereg = /^[1-9][0-9]{5}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}$/; //测试出生日期的合法性 
          } else { 
            ereg = /^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/; //测试出生日期的合法性 
          } 
          if (ereg.test(idcard)) { 
            return Errors[0]; 
          } 
          else { 
            return Errors[2]; 
          } 
          break; 
        case 18: 
          if (parseInt(idcard.substr(6, 4)) % 4 == 0 || (parseInt(idcard.substr(6, 4)) % 100 == 0 && parseInt(idcard.substr(6, 4)) % 4 == 0)) { 
            ereg = /^[1-9][0-9]{5}(19|20)[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]$/; //闰年出生日期的合法性正则表达式 
          } else { 
            ereg = /^[1-9][0-9]{5}(19|20)[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/; //平年出生日期的合法性正则表达式 
          } 
          if (ereg.test(idcard)) { //测试出生日期的合法性 
            //计算校验位 
            S = (parseInt(idcard_array[0]) + parseInt(idcard_array[10])) * 7 + (parseInt(idcard_array[1]) + parseInt(idcard_array[11])) * 9 + (parseInt(idcard_array[2]) + parseInt(idcard_array[12])) * 10 + (parseInt(idcard_array[3]) + parseInt(idcard_array[13])) * 5 + (parseInt(idcard_array[4]) + parseInt(idcard_array[14])) * 8 + (parseInt(idcard_array[5]) + parseInt(idcard_array[15])) * 4 + (parseInt(idcard_array[6]) + parseInt(idcard_array[16])) * 2 + parseInt(idcard_array[7]) * 1 + parseInt(idcard_array[8]) * 6 + parseInt(idcard_array[9]) * 3; 
            Y = S % 11; 
            M = "F"; 
            JYM = "10X98765432"; 
            M = JYM.substr(Y, 1); //判断校验位 
            if (M == idcard_array[17]) return Errors[0]; //检测ID的校验位 
            else return Errors[3]; 
          } else return Errors[2]; 
          break; 
        default: 
          return Errors[1]; 
          break; 
      } 
    };

##Finally call the method directly That’s it, the verification results will be returned.

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