[Javascript] Can I tell when an animated Gif is finished?

[javascript@xxxxxxxxxx (javascript@xxxxxxxxxx)]

Hi,

I need to display an animated gif (non-looping), wait for it to finish and=
 then go to another page.  At present I have tried a crude time delay after=
 switching on the gif:

    document[theImage].src =3D MyAnimGif.src;
    get the time...
    wait until time advanced so many seconds...

This works in some browsers but not others, where the switched-on gif=
 obviously gets flagged as pending but doesn't actually play until the delay=
 is over (presumably in idle time). Sorry, cannot remember which is IE and=
 which N.

Is there something like an onCompletion event I could attach to the image?=
 (Cannot find anything in a list of events I have.)  Or perhaps a way of=
 forcing the gif to display immediately to completion, or to begin=
 displaying immediately? Or some other way of detecting when the animation=
 is done?

Thanks for any help.

John