title: javascript or jquery countdown timer demo sample code
body: <p>Im working for a quiz application using php, mysql, javascript and jquery.</p>
  
  <p><em>I want to create a timer</em> in which I can set how many mins:secs.
  The timer should also be able to show a warning when you have less that 20 seconds left:
  <strong>20 seconds left to attempt or finish!</strong></p>
  
  <p>Suppose if I kept it for three minutes..that will be 180 secs...when it reaches to 160 secs... a pop up message should come to inform that you have only 20 secs left to attempt or finish</p>
  
  <p>Some suggestions, demo links that you know would be appreciated.</p>