a countdown timer

[farshad_momtaz]

hi,
i need a timer that count down the time from 30 to 0 and if the timer is zero the script run php code # 1 ( the timer will stop and if user refreshes the page it is still zero) and if the user hit button # 1 the timer will restart to 30 and the script will run php code # 2 ( the timer will count down again until it is zero). i want the script to work between 1 pm to 3pm(so it starts automatically i at 1)and if the timer didn't get to zero until 3pm i want it to stop counting down and show a message or goes to a different page.
and obviously the timer should show a same number for all the users!
is there any way to do that and if yes how?
can i do it with ajax and if yes how?

thank you

farshad

[Dan Grossman]

It counts from 30 to 0, over a 2 hour period, so the number on screen should change once every 4 minutes?

And if any user hits a button, it starts over at 30 and you have to recompute the interval it should count down to reach 0 at 3PM again?

And really "code #1" has nothing to do with this timer, since it only runs at time 0, you could just automatically run it at 3PM?

I probably don't have this right, but your question is a bit of a mess.

[farshad_momtaz]

this is an understand able version of what i just said
I am making a website and the page is oriented around a countdown system. If the timer ever reaches 0, the whole thing will stop. Below are the specifics:

I need a countdown timer that runs from 30 seconds to 0 seconds. If the timer is at 0 seconds, the script runs php code #1 (which makes the timer stop and if any user refreshes the page, it will still stay at zero).
There is also two buttons. If user clicks on button #1, the timer will get reset to 30 seconds remaining. Then the script will run the php code #2 (which allows the timer to begin counting down again from 30 seconds). If user clicks on button #2, the timer will get reset to 5 seconds remaining and same thing follows as the first button.

I want the timer counter script to between before certain hours (like let's say, noon-4PM). I want the counter to automatically begin at Noon with the above instructions. Also, if by 4PM, the counter never reaches 0 (meaning it never reaches php code #1), I want the timer counter to stop, disappear, and a message appear over it to link it to a new page.

And obviously the timer should show the same number (seconds remaining) for all the users on the website!