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Checks the validity of a given Isracard credit card number
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| 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; | |
| } |
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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