CAS Auto Login Script

casAutoLogin.user.js

// ==UserScript==
// @name         CAS Auto Login
// @namespace    lab.lightsing.me
// @version      0.1
// @description  CAS Auto Login
// @author       lightsing
// @match        https://cas.sustc.edu.cn/*
// ==/UserScript==

(function() {
    'use strict';
    var username = document.getElementById("username");
    var password = document.getElementById("password");
    var login_btn = document.getElementsByClassName("btn-submit")[0];
    if (username !== undefined){
        username.value = "Student ID";
        password.value = "Password";
        login_btn.click();
    }
})();