Make StackOverflow layout less distracting - removes sidebar and notifications

stackoverflow_zen.user.js

// ==UserScript==
// @name           StackOverflow - Zen
// @namespace      mkows
// @description    Make StackOverflow layout less distracting - removes sidebar and notifications
// @include        http://stackoverflow.com/*
// @include        https://stackoverflow.com/*
// @version        0.0.2
// ==/UserScript==

// Install steps:
// 1. Open in Chrome: chrome://extensions
// 2. Drag and drop this userscript file (make sure it has extension: *.user.js)
//
// Based on: http://hayageek.com/greasemonkey-tutorial/#hello-world

var sidebarElement = document.getElementById("sidebar");
if (sidebarElement) {
  sidebar.style.display="none";
}

var secNav = document.getElementsByClassName("secondary-nav")[0];
if (secNav) {
  secNav.style.display="none";
}