it depends on how you will use it... but if you care about browser compatibility go with a php countdown script, ex: http://www.hotscripts.com/listing/php-countdown/
Hi there, JavaScript is totally fine for this purpose. In fact, if you look at the source on Ebay auctions, the display of the "time left" for auctions is done with Javascript. Probably a variation on the JQuery countdown code here; http://keith-wood.name/countdown.html You should not use this code, however, to manage server side operations. Because of the nature of client side code, this should only be used for display and possibly an action after the timeout. Not to trigger an event on the server.