ID card authenticity Check JS, ID card length regular verification

Authenticity check of ID card number

<input type= "text" value= "Please enter your ID number" id= "cards" >
<button onclick= "Isidcardno (CV)" >ok</button>

<script>

function $ (ID) {return document.getElementById (ID);}
var CV; Gets the value of the input box
$ (' cards '). onblur = function () {
Console.log ($ (' cards '). Value)
CV = $ (' cards '). Value;
}

//This can verify 15-bit and 18-bit IDs, and includes validation of birthdays and check bits.
//If interested, you can also add the identification of the location of the identity card, that is, the first 6 digits some numbers are legal.
function Isidcardno (num) {
num = Num.touppercase ();
The ID number is 15-bit or 18-bit, 15-bit is all digits, 18 bits is the first 17 digits, and the last one is the check digit, possibly the number or the character X.
if (! ( /(^\d{15}$) | (^\d{17} ([0-9]| X) $)/.test (num))) {
Alert (' Enter the wrong ID number, or the number does not meet the rules! \n15 digits should be all numbers, the 18-digit number can be the number or X. ‘);
return false;
}
//Check digit is generated according to ISO 7064:1983.mod 11-2, X can be considered as the number 10.
//below analyze birth date and check digit separately
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);
//Check that the birthday date is correct
var Dtmbirth = new Date (' + ' + 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) {
Alert (' entered in the ID number of the birth date is wrong! ‘);
return false;
} else {
//Convert 15-bit ID to 18-bit
//Check digit is generated according to ISO 7064:1983.mod 11-2, X can be considered as the number 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) + ' + ' + num.substr (6, num.length-6);
for (i = 0; i <; i++) {
Ntemp + = Num.substr (i, 1) * arrint[i];
}
num + = arrch[ntemp% 11];
return num;
}
}
if (len = = 18) {
Re = new RegExp (/^ (\d{6}) (\d{4}) (\d{2}) (\d{2}) (\d{3}) ([0-9]| X) $/);
var arrsplit = Num.match (re);
//Check that the birthday date is correct
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) {
Alert (Dtmbirth.getyear ());
Alert (arrsplit[2]);
Alert (' entered in the ID number of the birth date is wrong! ‘);
return false;
} else {
//Verify that the check code for the 18-digit ID is correct.
//Check digit is generated according to ISO 7064:1983.mod 11-2, X can be considered as the number 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 <; i++) {
Ntemp + = Num.substr (i, 1) * arrint[i];
}
Valnum = arrch[ntemp% 11];
if (valnum! = Num.substr (17, 1)) {
Alert (' 18 ID ' check code is incorrect!) should be: ' + valnum);
return false;
}
return num;
}
}
return false;
}
</script>

Simple regular validation of the ID card length (the following takes effect under the MINIUI framework)

function Onidcardsvalidation (e) {
if (e.isvalid) {
var pattern =/(^\d{15}$) | (^\d{18}$) | (^\d{17} (\d| X|X) $)/;
if (E.value.length < | | e.value.length > | | pattern.test (e.value) = = False) {
E.errortext = "ID card input is not legal";
E.isvalid = false;
}
};
}

ID card authenticity Check JS, ID card length regular verification