身份证验证 javascript函数

身份证验证 javascript函数

<?PHP

function checkCardId(socialNo)
{
var message = '';
if(socialNo == "")
{
message = "身份证号码不能为空!";
return message;
}

if (socialNo.length != 15 && socialNo.length != 18)
{
message = "身份证号码长度不正确!";
return message;
}

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"};

if(area[parseInt(socialNo.substr(0,2))]==null) {
message = "身份证号码不正确(地区非法)!";
return message;
}

if (socialNo.length == 15)
{
pattern= /^\d{15}$/;
if (pattern.exec(socialNo)==null){
message = "15位身份证号码必须为数字！";
return message;
}
var birth = parseInt("19" + socialNo.substr(6,2));
var month = socialNo.substr(8,2);
var day = parseInt(socialNo.substr(10,2));
switch(month) {
case '01':
case '03':
case '05':
case '07':
case '08':
case '10':
case '12':
if(day>31) {
message = '身份证号码格式不正确!';
return message;
}
break;
case '04':
case '06':
case '09':
case '11':
if(day>30) {
message = '身份证号码格式不正确!';
return message;
}
break;
case '02':
if((birth % 4 == 0 && birth % 100 != 0) || birth % 400 == 0) {
if(day>29) {
message = '身份证号码格式不正确!';
return message;
}
} else {
if(day>28) {
message = '身份证号码格式不正确!';
return message;
}
}
break;
default:
message = '身份证号码格式不正确!';
return message;
}
var nowYear = new Date().getYear();
if(nowYear - parseInt(birth)<15 || nowYear - parseInt(birth)>100) {
message = '身份证号码格式不正确!';
return message;
}
return true;
}

var Wi = new Array(
7,9,10,5,8,4,2,1,6,
3,7,9,10,5,8,4,2,1
);
var   lSum        = 0;
var   nNum        = 0;
var   nCheckSum   = 0;

for (i = 0; i < 17; ++i)
{
if ( socialNo.charAt(i) < '0' || socialNo.charAt(i) > '9' )
{
message = "身份证号码格式不正确!";
return message;
}
else
{
nNum = socialNo.charAt(i) - '0';
}
lSum += nNum * Wi[i];
}

if( socialNo.charAt(17) == 'X' || socialNo.charAt(17) == 'x')
{
lSum += 10*Wi[17];
}
else if ( socialNo.charAt(17) < '0' || socialNo.charAt(17) > '9' )
{
message = "身份证号码格式不正确!";
return message;
}
else
{
lSum += ( socialNo.charAt(17) - '0' ) * Wi[17];
}

if ( (lSum % 11) == 1 )
{
return true;
}
else
{
message = "身份证号码格式不正确!";
return message;
}
}

?>