IE throws an "Object required" error when trying to use the Event Object from another window/frame

I found a JavaScript error in a script that I'm developing. I whittled it down to a pair of fairly concise pages that still produce the error: * http://troy.onespot.com/static/4505/index.html * http://troy.onespot.com/static/4505/iframe.html If you load the first page in Internet Explorer 8 (or probably 6 or 7, for that matter), give it about half a second to run the script, then click the "Google" link inside of the `