Why does this [removed] iframe ads code completely break Internet Explorer?

Question

So, I\'m trying to find an answer to why this problem is happening; I\'ve fixed the problem, but I want to know why it happened.

TL;DR

Google-provided conversi

Answer 1

document.write() blocks further page rendering until it finishes. I assume that the remote script was taking a while to load, and thus blocking the rest of the page from loading.

I also assume that Math.Random() function doesn't help matters.

Also...Google's tracking codes scare me...they tend to be ugly hacks of javascript.