Validação JavaScript CPF e CNPJ Magento 1.x

Validation.add('validate-cpfcnpj', 'CPF/CNPJ inválido.', function(v){
    return validateCPF(v) || validateCNPJ(v);
});

function validateCPF(strCPF) {
    var sum;
    var rest;
    sum = 0;
    if (strCPF == "00000000000") return false;

    for (i=1; i<=9; i++) sum = sum + parseInt(strCPF.substring(i-1, i)) * (11 - i);
    rest = (sum * 10) % 11;

    if ((rest == 10) || (rest == 11))  rest = 0;
    if (rest != parseInt(strCPF.substring(9, 10)) ) return false;

    sum = 0;
    for (i = 1; i <= 10; i++) sum = sum + parseInt(strCPF.substring(i-1, i)) * (12 - i);
    rest = (sum * 10) % 11;

    if ((rest == 10) || (rest == 11))  rest = 0;
    if (rest != parseInt(strCPF.substring(10, 11) ) ) return false;
    return true;
}

function validateCNPJ(cnpj) {

    cnpj = cnpj.replace(/[^\d]+/g,'');

    if(cnpj == '') return false;

    if (cnpj.length != 14)
        return false;

    // Known invalid CNPJ list
    if (cnpj == "00000000000000" ||
        cnpj == "11111111111111" ||
        cnpj == "22222222222222" ||
        cnpj == "33333333333333" ||
        cnpj == "44444444444444" ||
        cnpj == "55555555555555" ||
        cnpj == "66666666666666" ||
        cnpj == "77777777777777" ||
        cnpj == "88888888888888" ||
        cnpj == "99999999999999")
        return false;

    // Validate Verifier Digit
    size = cnpj.length - 2
    numbers = cnpj.substring(0,size);
    digits = cnpj.substring(size);
    sum = 0;
    pos = size - 7;
    for (i = size; i >= 1; i--) {
        sum += numbers.charAt(size - i) * pos--;
        if (pos < 2)
            pos = 9;
    }
    result = sum % 11 < 2 ? 0 : 11 - sum % 11;
    if (result != digits.charAt(0))
        return false;

    size = size + 1;
    numbers = cnpj.substring(0,size);
    sum = 0;
    pos = size - 7;
    for (i = size; i >= 1; i--) {
        sum += numbers.charAt(size - i) * pos--;
        if (pos < 2)
            pos = 9;
    }
    result = sum % 11 < 2 ? 0 : 11 - sum % 11;
    if (result != digits.charAt(1))
        return false;

    return true;

}