Example doesn't work

I'm not sure if they changed this since your article, but the code doesn't work. The iframe contents is not available to scrape via JavaScript. In your example, you have the following:

``` javascript
document.querySelectorAll('#googleAdSenseLeft ul li a');
```

This returns an empty array.

When using the console, I try the following:

``` javascript
document.querySelectorAll('#googleAdSenseLeft iframe html');
```

It returns an empty array as well.

I tried this in Safari, Chrome and Firefox.

Any thoughts on how to overcome this?

Eric