var jsdom = require("jsdom");var exec = require('child_process').exec; jsdom.env({  url: "http://open.baidu.com/special/time/",  scripts: ["D://jquery-1.9.1.min.js"],  features: {    ProcessExternalResources: ["script"]  },  done: function (errors, window) {    var $ = window.$;    var curtime = $('#time').text();    console.log('get time: ' + curtime);     // 更新系統(tǒng)時(shí)間    exec('time ' + curtime, function(err, stdout, stderr) {      console.log('change time ' + curtime + ': ' + (err ? err : 'success'));      process.exit();    });  }});