title: Countdown timer in rails
body: <p>In my application, I have a deadline in this format : 2011-08-26 16:45:00 UTC.
  In my controller, I am calculating the difference between this date and the current one. The result looks like this : 64:18:13.
  I want to create a timer which counts from 64:18:13 until 00:00:00.
  How can I do it ?
  Thanks.</p>