js password generator

gistfile1.txt

// Based on oi.js by Dan Kaminsky https://gist.github.com/PaulCapestany/6148566
var base58alphabet = '123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ';
function millis()         { return Date.now(); }
function flip_coin()      { n=0; then = millis()+1; while(millis()<=then) { n=!n; } return n; }
function get_fair_bit()   { while(1) { a=flip_coin(); if(a!=flip_coin()) { return(a); } } }
function get_random_6bit(){ n=0; bits=6; while(bits--){ n<<=1; n|=get_fair_bit(); } return n; }
function get_password(length) {
    var password = "";
    var offset = 0; // offset allows us to go through the infinite alphabet thus minimizing bias towards lower characters.
	length = (length ? length : 10)
    while (password.length < length)
    {
        offset = (offset + get_random_6bit()) % base58alphabet.length;
        password += base58alphabet[offset];
    }
    return password;
}

console.log(get_password(12));