ALERT: DOMContentLoaded event fired on document!
ALERT: DOMContentLoaded event bubbled to window!
ALERT: Timer callback called.
ALERT: load event fired!
ALERT: PASSED
Test case for bug 5122: Equivalent of Mozilla's DOMContentLoaded needed

You should see a note about the DOMContentLoaded event being fired and bubbled, a timer being called, and then the load event being fired.