ספרת ביקורת – הבדלי גרסאות

if (id.length != 9 || isNaN(id)) { // Make sure ID is formatted properly

return false;

var countersum = 0, incNum;

for (var i in id) {

incNum = Number(id[i]) * ((i % 2) + 1); //multiply digitMultiply number by 1 or 2

counter sum += (incNum > 9) ? incNum - 9 : incNum; //sum Sum the digits up and add to countertotal

return (countersum % 10 === 0);