// ==UserScript==
// @name         Facebook Back to Top
// @namespace    http://tampermonkey.net/
// @version      1.3
// @description  Click the red link on the bottom of your Facebook page to scroll back to the top of your News Feed.
// @author       Eric Mintz
// @match        https://www.facebook.com/*
// @grant        none
// ==/UserScript==
(function() {
'use strict';
var addListener = function(element,eventName,listener){
if(element.addEventListener){
element.addEventListener(eventName, listener);
}else{
element.attachEvent('on'+eventName, listener);
}
};
var removeListener = function(element, eventName, listener){
if(element.removeEventListener){
element.removeEventListener(eventName, listener);
}else{
element.detachEvent('on'+eventName, listener);
}
};
var toTop = function(e){
e.preventDefault();
window.scrollTo(0,0);
};
var listener = function(e) {
removeListener(window,'load',listener);
var el = document.createElement('a');
el.innerText = 'Back to Top';
el.style.cssText = 'position:fixed; color:#fff;bottom:0; right:80px;z-index:10000;padding:2px 9px;font-weight:bold;text-decoration:none;background-color:#b00;border-top-right-radius:7px;border-top-left-radius:7px;box-shadow:0 0 6px rgba(0,0,0,.5);';
addListener(el,'click',toTop);
document.body.appendChild(el);
};
addListener(window,'load',listener);
listener();
})();