// ==UserScript==
// @name         允许下载
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  try to take over the world!
// @author       You
// @match        http://*.kjt.gx.gov/*
// @grant        none
// @run-at       document-end
// ==/UserScript==
(function() {
    'use strict';
    // 创建允许下载文件按钮元素
    var floatingButton = document.createElement('button');
    floatingButton.textContent = '允许下载文件';
    floatingButton.style.position = 'fixed';
    floatingButton.style.bottom = '60px';
    floatingButton.style.right = '20px';
    document.body.appendChild(floatingButton);
    floatingButton.addEventListener('click',DownloadMain);

    function DownloadMain(){

        let xpathExpression = '//li[@class="wb-tree-item"]/div/span[contains(text(),"下载")]';
        let allLinks = window.parent.document.evaluate(xpathExpression, window.parent.document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
        for (var i = 0; i < allLinks.snapshotLength; i++) {
            let thisLink = allLinks.snapshotItem(i);
            // do something with thisLink
            thisLink.setAttribute("style", "");
        }
    }
})();