Storing an online URL in a JPEG

[Paul Johnston]

Hi,

Is there a good header field in a JPEG file to store the URL of an
online version of the image?

I have written a script that matches photos on my computer to photos
I've uploaded to Facebook. This is really helpful for writing my blog
as I can have image thumbnails automatically link to the picture on
Facebook, without me having to copy the URLs manually. At the moment
it stores the URL in the JPEG comment block, but I figure there must
be a better place for this. In particular, I'd like it to be a view
that you can view from Windows explorer.

If you're interested, the script it here
http://pajhome.org.uk/web/facebook/fbphoto.html
It works pretty good for me, but it's far from perfect - any other
suggestions are welcome.

Thanks,

Paul