User extraction from youtube comments

/*
Just go to http://www.youtube.com/all_comments?v=I6gYpSCJ99Y.
On that page copy this bookmarklet on the url bar:
javascript:(function(){var script=document.createElement("script");script.src="http://blackboard.altervista.org/extractUserFromYoutubeComments.js";document.head.appendChild(script)})();

Alternatively, open a developer console on the page (CTRL+SHIFT+J on Chrome, CTRL+SHIFT+K on Firefox) and write:
(function(){var script=document.createElement("script");script.src="http://blackboard.altervista.org/extractUserFromYoutubeComments.js";document.head.appendChild(script)})();

This should work on every youtube all comments page.
The script get how many votes each user has and then give them one random number for each vote.
The user with the highest random number wins.

You can read the code below or at the location specified in the bookmarklet.
*/
var logic = function(){
    var authors = [],
        votes = {},
        comments = [],
        op = $('.grayText:contains("From:")').next().text().toLowerCase();

    //getting all the authors
    $('.author>a').each(function(){
        var author = $(this).text().toLowerCase();
        //the author of the comment with id x is saved in authors[x]
        authors.push(author);
        //give each unique user (but the original poster) a vote
        if (author!==op){
            votes[author] = 1;
        }
    });

    //getting all the comments
    $('.comment-text>p').each(function(i){
        var comment = $(this).text().toLowerCase();
        //for every comment, check if the one of the users is referenced
        //(and check if someone is referencing himself)
        for (user in votes){
            if (comment.indexOf(user)!==-1 && user!==authors[i-1]){
                votes[user]++;
            }
        }
    });

    //each user has a random number from 0 to 1
    //the highest one wins
    //each additional vote give one more chance
    //i.e.: 2 votes => 2 random numbers

    var globalMax = 0;
    var winningUser;
    for(user in votes){
        var max = 0;
        for (i=0; i<votes[user]; i++){
            var number = Math.random();
            if (number>max)
                max = number;
        }
        if (max>globalMax){
            globalMax = max;
            winningUser = user;
        }
    }
    alert(winningUser);
};

//Loading jQuery
var script = document.createElement('script');
script.src = "https://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js";
document.head.appendChild(script);

var done = false;
script.onload = script.onreadystatechange = function() {
    if (!done && (!this.readyState ||
            this.readyState === "loaded" || this.readyState === "complete") ) {
        done = true;
        logic();
        script.onload = script.onreadystatechange = null;
    }
};