Adds a simple search box to the top bar of the Hacker News site.
// ==UserScript==
// @name Hacker News Search
// @namespace http://www.ryangittins.com/
// @author Ryan Gittins
// @version 1.0.3
// @description Adds a simple search box to the top bar of the Hacker News site.
// @match *://news.ycombinator.com/*
// @copyright 2014
// @grant none
// ==/UserScript==
// Grab the top bar
var selector = document.querySelector('td > table > tbody > tr');
// Insert a new td between the submit link and the login link
var cell = selector.insertCell(2);
// Inject the search box html into the header
cell.innerHTML = '<span><form method="get" action="//hn.algolia.com/" style="margin:0;"><input style="height:20px;" type="text" name="q" size="16" placeholder="Search"></form></span>';