I'm looking for a little help with a countdown. I've tried a few things but just can't get them to work so i'm hoping someone out here can help me out. I'm looking for a javascript that will do a 3 minute countdown and display it on the screen, preferably not in a textbox, but i'm not picky.

Here is how it works. Someone will make a selection from a form. The date/time of that selection is then stored in a database. I want to use the date time stored in the database as my starting time and then countdown 3 minutes. After 3 minutes I would like a message saying Times Up, please make a selection.

Any ideas?

Thanks in advance! Sitepoint Rocks!