Favstar the Favotter Style

favstar.user.js

// ==UserScript==
// @name favstar the favotter style
// @include http://favstar.fm/*
// ==/UserScript==

(function() {
  var tweetContainers =
  document.evaluate('.//div[@class="tweetContainer"]', document, null, 5, null);
  var tweetContainer;
  while (tweetContainer = tweetContainers.iterateNext()) {
    var tweet = document.evaluate('.//div[@class="theTweet"]', tweetContainer,
    null, 9, null).singleNodeValue;
    var stars = Number(document.
    evaluate('.//div[starts-with(@class,"favouritesCount")]', tweetContainer,
    null, 9, null).singleNodeValue.lastChild.nodeValue);
    tweet.style.color =
    stars >= 5 ? "#FF0000" :
    stars >= 3 ? "#660099" :
    stars >= 2 ? "#009900" :
    stars >= 1 ? "#333333" :
    "";
    tweet.style.fontSize =
    stars >= 6 ? "6em" :
    stars >= 5 ? "5em" :
    stars >= 4 ? "4em" :
    stars >= 3 ? "3em" :
    stars >= 2 ? "2em" :
    stars >= 1 ? "" :
    "";
    tweet.style.fontWeight =
    stars >= 2 ? "600" :
    "";
    tweet.style.lineHeight = "1.2";
  }
})();