gistfile1.js

var page = require('webpage').create();
page.settings.loadImages = false;
page.onConsoleMessage = function(msg) { console.log(msg); };

var pageUrl = 'http://www.bloggersentral.com/2010/08/how-put-add-adsense-on-blogger.html';
var num = 0;
var max = 2;

page.onLoadFinished = function() {
    var text = page.evaluate(function() {
        var sDoc = document.getElementById('aswift_1').contentWindow.document;
        var xDoc = sDoc.getElementById('google_ads_frame2').contentWindow.document;
        if (xDoc) {
            return xDoc.body.innerText || xDoc.querySelector('img').src + '\n';
        }
    });

    if (!text) {
        console.log('please add "--web-security=no" to phantomjs(1.5.0 and above) command-line and try again');
        phantom.exit(1);
    }

    if (num <= max) {
        console.log('google ads ' + (num++) + ':\n' + text);
        page.open(pageUrl + '?' + Math.random());
    } else {
        phantom.exit();
    }
};

page.open(pageUrl + '?' + Math.random());