Use Casper to scrap web page.

casper-scraper.js

var utils = require('utils');
var casper = require('casper').create({
    verbose: true,
    logLevel: 'error',
    pageSettings: {
        loadImages: false,
        loadPlugins: false,
        userAgent: 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.2 Safari/537.36'
    }
});

casper.start('http://app.baidu.com/appweb/search?w=qq&cid=0&lcid=0&ps=100&pn=3', function() {
    var img = this.evaluate(function() {
        var images = document.querySelectorAll('.search-list li img');
        var imageSrcList = [];
        for (var i = 0; i < images.length; i++) {
           imageSrcList.push(images[i].getAttribute('src'));
        }
        return imageSrcList;
    });
    utils.dump(img);
});


casper.run(function() {
});