casper抓取加载慢的页面

实现功能是在网页加载完全后，跳到网页底部.

var casper = require('casper').create({
    verbose: true,
    logLevel: "debug",
    timeout: 0,//60秒超时，退出);
    pageSettings: {
        userAgent: 'Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20100101 Firefox/17.0'
    },
    viewportSize: {
        width: 1280,
        height: 1024
    },
});

var fs = require('fs');

casper.on('timeout', function () {

})
casper.start('http://news.baidu.com/', function () {

});

casper.wait(5000,function(){
    this.scrollToBottom();
});

casper.wait(10000);

casper.run();