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<script language="javascript"><!--
//简单的正则表达式：
//（1）preg_match("/^(\d{18,18}|\d{15,15}|\d{17,17}x)$/",$id_card)
//（2）preg_match("/^(\d{6})(18|19|20)?(\d{2})([01]\d)([0123]\d)(\d{3})(\d|X)?$/",$id_card)
//（3）preg_match("/(^\d{15}$/)|(\d{17}(?:\d|x|X)$/),$id_card)
//复杂并且严格一些的验证：
//这个可以验证15位和18位的身份证，并且包含生日和校验位的验证。
//如果有兴趣，还可以加上身份证所在地的验证，就是前6位有些数字合法有些数字不合法。
function isIdCardNo(num)
{
num = num.toUpperCase();
//身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X。
if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num)))
{
//return false;
return '输入的身份证号长度不对，或者号码不符合规定！\n15位号码应全为数字，18位号码末位可以为数字或X。';
}
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
//下面分别分析出生日期和校验位
var len, re;
len = num.length;
if (len == 15)
{
re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
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 bGoodDay;
bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
if (!bGoodDay)
{
//return false;
return '19' + arrSplit[2] + "-" + arrSplit[3] + "-" + arrSplit[4]+'输入的身份证号里出生日期不对！';
}
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 num;
}
}else if (len == 18)
{
re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
var arrSplit = num.match(re);
//检查生日日期是否正确
var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
var bGoodDay;
bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
if (!bGoodDay)
{
//return false;
return arrSplit[2] + "-" + arrSplit[3] + "-" + arrSplit[4]+'输入的身份证号里出生日期不对！';
}
else
{
//检验18位身份证的校验码是否正确。
//校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
var valnum;
var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
var nTemp = 0, i;
for(i = 0; i < 17; i ++)
{
nTemp += num.substr(i, 1) * arrInt[i];
}
valnum = arrCh[nTemp % 11];
if (valnum != num.substr(17, 1))
{
//return false;
return '18位身份证的校验码不正确！应该为：' + valnum;
}
}
}
var sBirthday=num.substr(6,4)+"-"+Number(num.substr(10,2))+"-"+Number(num.substr(12,2));
var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}
if(aCity[parseInt(num.substr(0,2))]==null)
{
//return false;
return '错误的地区码('+num.substr(0,2)+')！';
}
if(Number(num.substr(6,2))<19)
{
//return false;
return sBirthday+'你不会是19世纪以前的出生吧？';
}
//return true;
return aCity[parseInt(num.substr(0,2))]+','+sBirthday+','+(num.replace(/x$/i,'a').substr(16,1)%2?"男":"女");
}
document.write(isIdCardNo("34052419"),"<br />");
document.write(isIdCardNo("340524198002300019"),"<br />");
document.write(isIdCardNo("340524197711111111"),"<br />");
document.write(isIdCardNo("340524189901010010"),"<br />");
document.write(isIdCardNo("100524189901010016"),"<br />");
document.write(isIdCardNo("34052419800101001x"),"<br />");
--></script>