hipda里找来的代码

我自己试下，却没有效果，请问是哪里的问题呢？

- -代码写的有问题

/*口袋阅via浏览器翻页按钮by：fewtime */{var totn=document.createElement("div");totn.innerHTML="﹀";totn.setAttribute("style","font-size:36px !important;width:0vw !important;height:0vw !important;text-align:center !important;background-color:rgba(0,0,0,0) !important;box-shadow:0px 0px 1px rgba(0,0,0,1) !important;position:fixed !important;bottom:39vh !important;position:relative;top:60% !important;left:300px !important;z-index:99999 !important;border-radius:100% !important;");totn.onclick=function(){window.scrollBy(0,450);};document.getElementsByTagName("html").item(0).appendChild(totn);var totna=document.createElement("div");totna.innerHTML="︿";totna.setAttribute("style","font-size:36px !important;width:0vw !important;height:0vw !important;text-align:center !important;background-color:rgba(0,0,0,0) !important;box-shadow:0px 0px 1px rgba(0,0,0,1) !important;position:fixed !important;bottom:50vh !important;relative;top:40% !important;left:300px!important;z-index:99999 !important;border-radius:100% !important;");totna.onclick=function (){window.scrollBy(0,-450);};document.getElementsByTagName("html").item(0).appendChild(totna);};
/*黑色加强*/(function() {function addStyle(rules) {var styleElement = document.createElement('style'); styleElement.type = 'text/css';document.getElementsByTagName('head')[0].appendChild(styleElement);styleElement.appendChild(document.createTextNode(rules));}addStyle('html {background:#fff !important;}');addStyle('html *{background: none !important;color:#000 !important;border-color:#000 !important;border-width:0 !important;}'); })();

这个好用吗？试试看

不能用！