JavaScript ID number validation function support with X

Source: Internet
Author: User

 

//--identification number verification-support for new X ID card
function isidcardno (num)
{
var Factorarr = new Array (7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2,1);
Var error;
var vararray = new Array ();
Var intvalue;
var lngproduct = 0;
Var intcheckdigit;
var intstrlen = num.length;
var idNumber = num;
//Initialize
if (Intstrlen!= && (Intstrlen!=)) {
//error = "Enter the ID number length is not correct!" ";
//alert (Error);
//frmadduser.txtidcard.focus ();
return false;
}
//check and set value
for (i=0;i<intstrlen;i++) {
Vararray[i] = Idnumber.charat (i);
if (Vararr Ay[i] < ' 0 ' | | Vararray[i] > ' 9 ') && (i!=) {
//error = "Wrong ID number!.";
//alert (Error);
//frmadduser.txtidcard.focus ();
return false;
} else if (I <) {
Vararray[i] = Vararray[i]*factorarr[i];
}
}
if (Intstrlen = =) {
//check date
var date8 = idnumber.substring (6,14);
if (checkdate (Date8) = False) {
//error = "Incorrect date information in ID card!.";
//alert (Error);
return false;
}
//Calculate the sum of the products
for (i=0;i<17;i++) {
Lngproduct = lngproduct + vararray[i];

//Calculate the check digit
Intcheckdigit = 12-lngproduct%
Switch (intcheckdigit) {
Case 10: intcheckdigit = ' X ';
break;
Case One:
intcheckdigit = 0;
break;
Case:
Intcheckdigit = 1;
break;
}
//Check last digit
if (vararray[17].touppercase ()!= intcheckdigit) {
//error = "id parity bit error!... Correct for: "+ Intcheckdigit +".
//alert (Error);
return false;
}
}
else{//length is
//check date
var date6 = idnumber.substring (6,12);
if (checkdate) = = False) {
//alert ("ID date information is incorrect!.");
return false;
}

//alert ("correct.");
return true;
}

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