Gmail Domain Replacement - Switcher

Domain Replacement for Gmail.user.js

// ==UserScript==
// @name          Gmail Replace Domain
// @author        http://codejoust.com
// @namespace     http://mail.google.com/
// @description   example script to alert "Hello world!" on every page
// @include       http://mail.google.com/*
// ==/UserScript==
var your_domain = 'yourdomain.com'; //Your domain to change.
var canvas_frame = document.getElementById('canvas_frame').contentWindow.document; //The Canvas Frame in Gmail
var user_id = canvas_frame.getElementById('guser').getElementsByTagName('b')[0];   //Get the child b element containing username
user_id.innerHTML = user_id.innerHTML.replace('gmail.com',your_domain);            //The actual replacement of the domain takes place here.