如何使用JavaScript实现香港身份格式及真伪性验证
导语：如何使用JavaScript实现香港身份格式及真伪性验证呢?下面是小编给大家提供的代码实现，大家可以参考阅读，更多详情请关注应届毕业生考试网。
function IsHKID(str) {
var strValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
// basic check length
if (str.length < 8)
return false;
// handling bracket
if (str.charAt(str.length-3) == '(' && str.charAt(str.length-1) == ')')
str = str.substring(0, str.length - 3) + str.charAt(str.length -2);
// convert to upper case
str = str.toUpperCase();
// regular expression to check pattern and split
var hkidPat = /^([A-Z]{1,2})([0-9]{6})([A0-9])$/;
var matchArray = str.match(hkidPat);
// not match, return false
if (matchArray == null)
return false;
// the character part, numeric part and check digit part
var charPart = matchArray[1];
var numPart = matchArray[2];
var checkDigit = matchArray[3];
// calculate the checksum for character part
var checkSum = 0;
if (charPart.length == 2) {
checkSum += 9 * (10 + strValidChars.indexOf(charPart.charAt(0)));
checkSum += 8 * (10 + strValidChars.indexOf(charPart.charAt(1)));
} else {
checkSum += 9 * 36;
checkSum += 8 * (10 + strValidChars.indexOf(charPart));
}
// calculate the checksum for numeric part
for (var i = 0, j = 7; i < numPart.length; i++, j--)
checkSum += j * numPart.charAt(i);
// verify the check digit
var remaining = checkSum % 11;
var verify = remaining == 0 ? 0 : 11 - remaining;
return verify == checkDigit || (verify == 10 && checkDigit == 'A');
}
上面那段验证的.很精密，包含身份证真实性的校验，如果只是想验证输入的香港身份证格式，请使用下面的这段js。
function IsHKID(str) {
var strValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
// basic check length
if (str.length < 8)
return false;
// handling bracket
if (str.charAt(str.length-3) == '(' && str.charAt(str.length-1) == ')')
str = str.substring(0, str.length - 3) + str.charAt(str.length -2);
// convert to upper case
str = str.toUpperCase();
// regular expression to check pattern and split
var hkidPat = /^([A-Z]{1,2})([0-9]{6})([A0-9])$/;
var matchArray = str.match(hkidPat);
// not match, return false
if (matchArray == null)
return false;
return true;
}
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