In essence, we have a login function that pops up one of those nifty DHTML layers with a login box. Our top navigation is all flash, and has a login call to action…so having flash call javascript functions isnt hard, but getting javascript to “poke” at the flash and have it run an internal function is a bit trickier. Utilizing the aforementioned callback method, its fairly simple. The problem we had was, in Internet Explorer, order of operations was a bit out of whack.

we got an error on: __flash__addCallback(coreLoader, "loginNav"); coming from INSIDE the flash…what seemed to be happening was the javascript that set up the object “coreLoader” wasnt running at the right time because of the time it took for swfObject to set up the embed. So, adding coreLoader = $('coreLoader'); immediately AFTER so.write("topNav"); set up the object again, this time not filling the object with a null (because swfObject had correctly identified an embed with id=coreLoader), and allowing the internal flash “addCallback” function to work.

hm, technical writing is difficult. but i felt the need to document this problem (even if it wasnt very well) for my own future reference, and hopefully someone else will find it handy as well.

the more general moral of the story is: pay attention to order of operations, they may save your life some day.

Demo/source included in the posting of the project itself.

worth checking out for sure.

so while the IE bug is a strange, somewhat unpredicatble manifestation, one of my coworkers suggested this fix. I added it to the mix and everything is back to normal.

i tried to understand why, but really, it’s IE so all logic is out the window.

if anyone has any idea why this might happen, please, give a shout.

for the record, this can be fixed by following these directions: http://lists.deconcept.com/pipermail/swfobject-deconcept.com/2006-August/001407.html

Or, just comment out these lines from the swfobject.swf if (typeof window.onbeforeunload == 'function') {
var oldBeforeUnload = window.onbeforeunload;
window.onbeforeunload = function() {
deconcept.SWFObjectUtil.cleanupSWFs();
oldBeforeUnload();
}
} else {
window.onbeforeunload = deconcept.SWFObjectUtil.cleanupSWFs;
}


edit: for crying out loud, why dont any of my wordpress plugins for code formatting work???

edit 2:

Geoff at Deconcpet wrote me about this, and it was definitely a known issue. I’m previewing the next release of swfobject, which seems to have the problem locked down, although, i dont have the ability to test the main function of the cause of the bug: the release of swf’s with streaming content. I should have that soon, for testing, and will follow up a report on that.

Thanks, Geoff. You (and swfobject) are awesome.

WARNING: everything is still very alpha. very much in testing/production. report bugs in the comments, but theres a good chance i’m already aware/working on it