按的第一个greasemonkey插件：评论时可以粘贴啦~~

 1 // ==UserScript==
 2 // @name        tmall_vote
 3 // @namespace   jshe
 4 // @include     http://ratewrite.tmall.com/*
 5 // @version     1
 6 // @grant       none
 7 // ==/UserScript==
 8 alert(‘hello2‘);
 9 function embed() {
10   var getElementByXpath = function (path) {
11     return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
12   };
13   var jshe_setTextarea = function () {
14     jshe_cell.value = jshe_textarea.value;
15   };
16   jshe_cell = document.getElementsByClassName(‘rate-quanlity-content‘) [0];
17   jshe_textarea = document.createElement(‘textarea‘);
18   jshe_textarea.value = ‘Hello‘;
19   jshe_textarea.name = ‘jshe_textarea‘;
20   jshe_cell.parentNode.parentNode.appendChild(jshe_textarea);
21   var button = document.createElement(‘button‘);
22   button.innerHTML = ‘ClickMe‘;
23   button.onclick = jshe_setTextarea;
24   jshe_cell.parentNode.parentNode.appendChild(button);
25 }
26 var script = document.createElement(‘script‘);
27 script.type = ‘text/javascript‘;
28 script.innerHTML = embed + ‘\nsetTimeout(embed, 3000);‘;
29 document.getElementsByTagName(‘body‘) [0].appendChild(script);
30 //alert("hello3");