Rails spinoffs - Jan 2008 - Element.Fire on window.parent.document from iframe (fails in Opera)

I wanted to create an iframe that could be included on any page for
uploading images, without determining the parent behaviour at all from
within the iframe.  The iframe include just checks if there was an
image loaded, and does this to pass upload information to the parent
(this only fires when an image was uploaded):

$(window.parent.document).fire(''image:uploaded'',
objectWithInformation);

On the parent page, I do this:

$(document).observe(''image:uploaded'', parentPageCallback);

The idea is for different parent pages to be able to include the same
image upload module and do different things when an image is uploaded.

It works great for FF (2) and IE (7), but in Opera (9) I''ve had
trouble with pushing custom events to the parent document.  Does
anyone know if this is not allowed in Opera, or is perhaps the object
hierarchy different?  I have also just tested this technique with the
latest Safari (3.0.4), and it works without fail.

Thanks,
Ruquay K Calloway
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