https://www.cnblogs.com/wait-hua/p/5700342.html
https://www.cnblogs.com/niceyoo/p/12052212.html
// ==UserScript==
// @name 下一章udm123
// @namespace http://tampermonkey.net/
// @version 0.1
// @description try to take over the world!
// @author wodexianghua
// @match https://www.udm123.com/comic/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
document.addEventListener('keydown', function (event) {
if (document.activeElement.nodeName != 'BODY') { return; }
var shang = false;
var xia = false;
var tf = false;
var searchText;
var searchText2;
if (event.keyCode == 37) {/*左右*/
shang = true;
searchText = '上一章';
searchText2 = '上一页';
} else if (event.keyCode == 87) {/*we*/
shang = true;
searchText = '上一章';
searchText2 = '上一页';
} else if (event.keyCode == 67 || event.keyCode == 73 || event.keyCode == 39 ) {/*C c*/
xia = true;
searchText = '下一章';
searchText2 = '下一页';
console.log("click ben");
var s3 = document.querySelector("body > center:nth-child(5) > a:nth-child(4)")
var s1 = document.querySelector("body > center:nth-child(44) > center > a:nth-child(4)")
var s2 = document.querySelector("body > center:nth-child(14) > center > a:nth-child(4)");
if (typeof s3 === 'undefined' || s3 == null || s3 === '') {
console.log("s3");
} else {
s3.click();
}
if (typeof s2 === 'undefined' || s2 == null || s2 === '') {
console.log("s2");
} else {
s3.click();
}
if (typeof s1 === 'undefined' || s1 == null || s1 === '') {
console.log("s1");
} else {
s3.click();
}
//s2.click();
//s1.click();
//s3.click();
} else if (event.keyCode == 90 || event.keyCode == 89) {/*z Z y Y*/
window.scrollTo(0,0);
console.log("window.scrollTo");
}
});
// Your code here...
})();