>Nice idea. Yesterday when I was thinking about my original idea I thought, it would be easily hacked and they also can change system date. I was thinking, that the program may write some info into my WEB site and when read dates from it as well...

Nadya,

Thanks. With regards to getting around the changing of the local system date, I'm thinking you could always get the real current date/time from a web service and not rely on the workstation at all. Of course, if they don't have any internet connectivity, that's a whole other issue. ;)

I've decided not to go to that extreme as of yet, but it certainly is an option.

Laterness,
Jon