Real time Timer and time left with count down


I need to program a real time timer like Current Golowbids Time at

The date and time is real time.

Secondly, Time Left is the count down from the END datetime.

I use repeater to get the end datetime from MSSQL.

<%# DataBinder.Eval(Container.DataItem, "enddatetime") %>

How should I make the count down with day, hour, min, second?

Thanks for advice.
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techquesAuthor Commented:
how can the timer run itself? and how should I program the count down in comparing with the end datetime?  Is there any online tutorial or sample code? Is it javascript?
You can use the Timer Component

For each tick of the Timer you can calculate the time left by using the DateTime.Subtract

e.g. DateTime EndDate = new DateTime(2008, 11, 7, 22, 15, 0);
DateTime diff = EndDate.Subtract(DateTime.Now);

Display the diff.

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