Well, it's not from a script in his page, because it does not work with me. It must be from a 3rd party script, but there are so many of them that I'm simply not curious enough to discover wich.

Anyway, that blog is hosted on a 3rd party service, owned by an ad company. It's not that easy to blame him for what the service does. (Does Mish even know that blogger inserts ads there?)