The Bowling Kata, written in javascript, "score" function

gistfile1.txt

// This is the implementation from https://github.com/zachleat/JavaScript-Code-Katas

Game.prototype.score = function()
{
    var points = 0,
        frameIndex = 0;

    for(var frame = 0; frame<10; frame++) {
        if(this.isStrike(frameIndex)) {
            points += this.strikeBonus(frameIndex);
            frameIndex++;
        } else if(this.isSpare(frameIndex)) {
            points += this.spareBonus(frameIndex);
            frameIndex += 2;
        } else {
            points += this.sumOfBallsInFrame(frameIndex);
            frameIndex += 2;
        }
    }

    return points;
};