Salted variation of Fisher-Yates shuffle http://hashids.org/javascript/

consistentShuffle.js

function saltedShuffle(alphabet, salt) {
    var integer, j, temp, i, v, p;
    for (i = alphabet.length - 1, v = 0, p = 0; i > 0; i--, v++) {
        v %= salt.length;
        p += integer = salt[v].charCodeAt(0);
        j = (integer + v + p) % i;
        temp = alphabet[j];
        alphabet = alphabet.substr(0, j) + alphabet[i] + alphabet.substr(j + 1);
        alphabet = alphabet.substr(0, i) + temp + alphabet.substr(i + 1);
    }
    return alphabet;
}