js 验证身份证号码正确性
js 验证身份证号码正确性function isIdCardNo(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}$)|(^\d{17}(|X)$)/.test(num))) {
//alert('输入的身份证号长度不对，或者号码不符合规定！\n15位号码应全为数字，18位号码末位可以为数字或X。');
alert('身份证号长度不正确或不符合规定！');
return false;
}
//验证前2位，城市符合
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==null){
alert('身份证号不正确或不符合规定！');
return false;
}
//alert('城市:'+aCity);
//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})$/);
var arrSplit = num.match(re);//检查生日日期是否正确
var dtmBirth = new Date('19' + arrSplit + '/' + arrSplit + '/' + arrSplit);
var bGoodDay; bGoodDay = (dtmBirth.getYear() == Number(arrSplit)) && ((dtmBirth.getMonth() + 1) == Number(arrSplit)) && (dtmBirth.getDate() == Number(arrSplit));
if (!bGoodDay) {
alert('身份证号的出生日期不对！');
return false;
} else { //将15位身份证转成18位 //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
var nTemp = 0, i;
num = num.substr(0, 6) + '19' + num.substr(6, num.length - 6);
for(i = 0; i < 17; i ++) {
nTemp += num.substr(i, 1) * arrInt;
}
num += arrCh;
return true;
}
}
if (len == 18) {
re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})(|X)$/);
var arrSplit = num.match(re);//检查生日日期是否正确
var dtmBirth = new Date(arrSplit + "/" + arrSplit + "/" + arrSplit);
var bGoodDay; bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit)) && ((dtmBirth.getMonth() + 1) == Number(arrSplit)) && (dtmBirth.getDate() == Number(arrSplit));
if (!bGoodDay) {
//alert(dtmBirth.getYear());
//alert(arrSplit);
alert('身份证号的出生日期不对！');
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;
}
valnum = arrCh;
if (valnum != num.substr(17, 1)) {
//alert('18位身份证的校验码不正确！应该为：' + valnum);
alert('18位身份证号的校验码不正确！');
return false;
}
return true;
}
} return false;
}
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