This is the one by Jonathan Neal. I first found and tried to use this plugin with jQuery 1.3 and it was a no-go. I couldn't figure out why it didn't work, until I backed up to jQuery 1.2.6.
Just in case someone else runs into this, I thought I'd mention it here. I have submitted a note to Jonathon. http://jquery.thewikies.com/sifr/
