Add a link in the top banner of [Hacker News discussion](http://news.ycombinator.com/) to its counter part at [HN Premii](http://hn.premii.com/)
// ==UserScript==
// @name Hacker News
// @namespace com.ycombinator.news
// @include https://news.ycombinator.com/*
// @version 2.0
// @grant none
// @description Add a link in the top banner of [Hacker News discussion](http://news.ycombinator.com/) to its counter part at [HN Premii](http://hn.premii.com/)
// ==/UserScript==
function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
function readerUrl(id)
{
var url = 'http://hn.premii.com/';
if (id !== null && id.length > 0)
{
url += '#/comments/' + id;
}
return url;
}
var id = getParameterByName("id", window.location.href);
var readerLink = ' | <a href="' + readerUrl(id) + '">Reader</a>';
var topMenu = document.getElementsByClassName('pagetop') [0];
topMenu.innerHTML += readerLink;