JS实现身份证验证
function isCardNo(num) {
num = num.toUpperCase();
//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。
if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num))) {
return false;
}
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
//下面分别分析出生日期和校验位
var len, re;
len = num.length;
if (len == 15) {
re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
var arrSplit = num.match(re);
//检查生日日期是否正确
var dtmBirth = new Date('19' + arrSplit[2] + '/' + arrSplit[3] + '/' + arrSplit[4]);
var bCorrectDay;
bCorrectDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) &&
(
dtmBirth.getDate() == Number(arrSplit[4]));
if (!bCorrectDay) {
return false;
} else {
//将15位身份证转成18位
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
var nTemp = 0,
i;
num = num.substr(0, 6) + '19' + num.substr(6, num.length - 6);
for (i = 0; i < 17; i++) {
nTemp += num.substr(i, 1) * arrInt[i];
}
num += arrCh[nTemp % 11];
return true;
}
}
if (len == 18) {
re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
var arrSplit = num.match(re);
//检查生日日期是否正确
var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
var bCorrectDay;
bCorrectDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) &&
(dtmBirth.getDate() == Number(arrSplit[4]));
if (!bCorrectDay) {
return false;
} else {
//检验18位身份证的校验码是否正确。
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
var valnum;
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 nTemp = 0,
i;
for (i = 0; i < 17; i++) {
nTemp += num.substr(i, 1) * arrInt[i];
}
valnum = arrCh[nTemp % 11];
if (valnum != num.substr(17, 1)) {
return false;
}
return true;
}
}
return false;
}