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etodanik/isracard.js

Last active May 11, 2020 13:52
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Checks the validity of a given Isracard credit card number
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isracard.js
function isracardCheck(num) {
if(num.length < 8 || num.length > 9) return false;
var diff = "987654321",
sum = 0,
a = 0,
b = 0,
c = 0;
if(num.length < 9) num = "0" + num;
for(var i=1;i<9;i++){
sum += parseInt(diff.substr(i,1))*parseInt(num.substr(i,1));
}
if(sum % 11 == 0) return true;
else return false;
}
@etodanik
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I posted an article explaining the verification process:
http://povolotski.me/2013/09/24/isracard-credit-card-number-validation-2/

@avimar
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avimar commented Nov 29, 2016 •
edited

Original article offline, it's on wayback machine: https://web.archive.org/web/20140227235803/http://povolotski.me/2013/09/24/isracard-credit-card-number-validation-2/

Forked to be much simpler: https://gist.github.com/avimar/e7421f96357bf06acc31d952c7baf84e

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