var ibanLen = {
    NO:15, BE:16, DK:18, FI:18, FO:18, GL:18, NL:18, MK:19,
    SI:19, AT:20, BA:20, EE:20, KZ:20, LT:20, LU:20, CR:21,
    CH:21, HR:21, LI:21, LV:21, BG:22, BH:22, DE:22, GB:22,
    GE:22, IE:22, ME:22, RS:22, AE:23, GI:23, IL:23, AD:24,
    CZ:24, ES:24, MD:24, PK:24, RO:24, SA:24, SE:24, SK:24,
    VG:24, TN:24, PT:25, IS:26, TR:26, FR:27, GR:27, IT:27,
    MC:27, MR:27, SM:27, AL:28, AZ:28, CY:28, DO:28, GT:28,
    HU:28, LB:28, PL:28, BR:29, PS:29, KW:30, MU:30, MT:31
};

function isIBAN(iban) {
    var i,m,s;
    iban = iban.replace(/\s/g, '');
    if (!iban.match(/^[0-9A-Z]+$/)) return false;
    var len = iban.length;
    if (len != ibanLen[iban.substr(0,2)]) return false;
    iban = iban.substr(4) + iban.substr(0,4);
    for (s = '', i = 0; i < len; i += 1) s += parseInt(iban.charAt(i),36);
    for (m = s.substr(0, 15) % 97, s = s.substr(15); s; s = s.substr(13)) m = (m + s.substr(0,13)) % 97;
    return m == 1;
}

;isIBAN('GB82 WEST 1234 5698 7654 32');
;isIBAN('GB82 WEST 1.34 5698 7654 32');
;isIBAN('GB82 WEST 1234 5698 7654 325');
;isIBAN('GB82 TEST 1234 5698 7654 32');
;isIBAN('SA03 8000 0000 6080 1016 7519');

/*
=!EXPECTSTART!=
isIBAN('GB82 WEST 1234 5698 7654 32') ==> true
isIBAN('GB82 WEST 1.34 5698 7654 32') ==> false
isIBAN('GB82 WEST 1234 5698 7654 325') ==> false
isIBAN('GB82 TEST 1234 5698 7654 32') ==> false
isIBAN('SA03 8000 0000 6080 1016 7519') ==> true
=!EXPECTEND!=
*/