How to validate PIS (Social Integration Program) in Javascript?

I'm needing a function that validates PIS . I've already searched and those I meet, do not work.

I found this:

function validarPIS(pis) {
    var multiplicadorBase = "3298765432";
    var total = 0;
    var resto = 0;
    var multiplicando = 0;
    var multiplicador = 0;
    var digito = 99;

    // Retira a mascara
    var numeroPIS = pis.replace(/[^\d]+/g, '');

    if (numeroPIS.length !== 11 ||
        numeroPIS === "00000000000" ||
        numeroPIS === "11111111111" ||
        numeroPIS === "22222222222" ||
        numeroPIS === "33333333333" ||
        numeroPIS === "44444444444" ||
        numeroPIS === "55555555555" ||
        numeroPIS === "66666666666" ||
        numeroPIS === "77777777777" ||
        numeroPIS === "88888888888" ||
        numeroPIS === "99999999999") {
        return false;
    } else {
        for (var i = 0; i < 10; i++) {
            multiplicando = parseInt(numeroPIS.substring(i, i + 1));
            multiplicador = parseInt(multiplicadorBase.substring(i, i + 1));
            total += multiplicando * multiplicador;
        }

        resto = 11 - total % 11;
        resto = resto === 10 || resto === 11 ? 0 : resto;

        digito = parseInt("" + numeroPIS.charAt(10));
        return resto === digito;
    }
}  

But I could not get it to work.