LudumDare Theme Slaughter with arrowkeys & GreaseMonkey Firefox plugin

LudumDareKeysToVote.js

// ==UserScript==
// @name        LudumDareThemeSlaughterKeyboard
// @namespace   unitycoder.com
// @description use arrowkeys to vote
// @include     http://ludumdare.com/theme/*
// @include     http://www.ludumdare.com/theme/*
// @version     1.3
// @grant       none
// ==/UserScript==

// OPTIONAL(remove comments from next 2 lines) - Reads the theme name : Powered by TTS-API.COM
//var theme = document.querySelector("body > center:nth-child(1) > table:nth-child(4) > tbody:nth-child(1) > tr:nth-child(1) > td:nth-child(1) > a:nth-child(1)").innerHTML;
//document.querySelector("body").innerHTML +=("<audio autoplay><source src=http://tts-api.com/tts.mp3?q=" + escape(theme) + " type=audio/mpeg></audio>");

// select voting elements
var good = document.querySelector("body > center:nth-child(1) > table:nth-child(4) > tbody:nth-child(1) > tr:nth-child(2) > td:nth-child(1) > a:nth-child(1)");
var bad = document.querySelector("body > center:nth-child(1) > table:nth-child(4) > tbody:nth-child(1) > tr:nth-child(2) > td:nth-child(2) > a:nth-child(1)");
var slaughter = document.querySelector("body > center:nth-child(1) > table:nth-child(4) > tbody:nth-child(1) > tr:nth-child(3) > td:nth-child(1) > a:nth-child(1)");

// append arrows
good.innerHTML = "&lt; "+good.innerHTML;
bad.innerHTML += " &gt;";
slaughter.innerHTML = " \\/ "+slaughter.innerHTML+" \\/";

// listen keys
document.onkeydown = KeyListener;
function KeyListener(e)
{
	e = e || window.event;
	if (e.keyCode == '40') Vote(slaughter);   // down arrow (slaughter)
	if (e.keyCode == '37') Vote(good);     // left arrow (good)
	if (e.keyCode == '39') Vote(bad);     // right arrow (bad)
}

function Vote(obj)
{
	obj.parentElement.style.backgroundColor = "#00FF00";
//	window.location = url; // doesnt set header Referer, in case the server checks it
	obj.click(); // call click() on the link, sets Referer
}