// ==UserScript==
// @name         Free-adz Quizlet
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  动动鼠标告别广告
// @author       bbbbbbr
// @match        https://quizlet.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    document.addEventListener("mousemove", deleteAdz);

    function deleteAdz() {
        checkAndRemove(document.getElementsByClassName("StickySkyscraperAdz")[0]);
        checkAndRemove(document.getElementsByClassName("SetPageHeaderAdz-container")[0]);
        checkAndRemove(document.getElementsByClassName("SetPage-embeddedDesktopAdWrapper")[0]);
        checkAndRemove(document.getElementsByClassName("ModeLayout-ad")[0]);
    }

    function checkAndRemove(obj) {
        if (obj != null) {
            obj.remove();
        }
    }
})();