//
// elf check routine voor bankrekening nummer controle
//

function elfcheck(banknr) {

    var total = 0;
    total += (banknr.charAt(0) * 9);
    total += (banknr.charAt(1) * 8);
    total += (banknr.charAt(2) * 7);
    total += (banknr.charAt(3) * 6);
    total += (banknr.charAt(4) * 5);
    total += (banknr.charAt(5) * 4);
    total += (banknr.charAt(6) * 3);
    total += (banknr.charAt(7) * 2);
    total += (banknr.charAt(8) * 1);

    return (total % 11) == 0;
}