> The simple question would be:
> in case of iFrame are postMessage a two-way communication?
> (based on https://developer.mozilla.org/En/DOM:window.postMessage)
> The harder question is if the answer is yes:
> why does the following don't work?
> Look at both the inner frame and the main window's source.
> I want simply send a message to the main window via postMessage. It
> silently aborts.
I think with Mozilla the event is sent to the window, not to the
document object. So use