gistfile1.txt

// ==UserScript==
// @name         Ebay listing helper
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://bulksell.ebay.ca/**
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.getElementById("upc").focus();
    document.getElementById("upc").value = '';

    setInterval(function() {
        document.getElementById("editpane_subtitle").setAttribute("disabled", "disabled");
        document.getElementById("bold").setAttribute("disabled", "disabled");
    }, 2000);
})();