Does anyone know what this script is called?

Hi All

Do any of you know what the script is called that people are using to sell limited packages? For instance if they are selling article packs and they are only selling 25 packs and every time a pack is sold, the script counts it down from 25 to 24, 23, 22 etc.

I have looked at various firesale scripts but have not found what I was looking for. I think it might be called "reverse click counter" or something in that line.

Also, do you have any idea where one might find a script like that?

Many thanks

I have searched in Google - could not find anything that is why I am asking here cguru:

find a site that has it. and look at the source code. it might tell you