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Time countdown problem


ash007

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Hi Everybody,

 

  I have time count down code.It' working fine.But the problem now I have some moification.When I click on the button I want to increment the time by 20 seconds.How can I do this.

Here I included code for your reference.

Thanks in advance.

--------------------------

<html>

<head>

<title>Multiple Countdown Clocks</title>

</head>

<body>

<div id="clock1">[clock1]</div>

<div id="clock2">[clock2]</div>

<input name="submit" type="submit" onClick="dthen+20">

</body>

<!--http://www.hashemian.com/tools/javascript-countdown.htm-->

<script language="JavaScript">

  StartCountDown("clock1","06/27/2010 12:33 PM -0400")

  StartCountDown("clock2","07/27/2010 2:00 PM -0400")

 

  /*

  Author: Robert Hashemian (http://www.hashemian.com/)

  Modified by: Munsifali Rashid (http://www.munit.co.uk/)

  Modified by: Tilesh Khatri

  */

 

  function StartCountDown(myDiv,myTargetDate)

  {

 

    var dthen = new Date(myTargetDate);

    var dnow = new Date();

    ddiff = new Date(dthen-dnow);

    gsecs = Math.floor(ddiff.valueOf()/1000);

    CountBack(myDiv,gsecs);

  }

 

  function Calcage(secs, num1, num2)

  {

    s = ((Math.floor(secs/num1))%num2).toString();

    if (s.length < 2)

    {

      s = "0" + s;

    }

    return (s);

  }

 

  function CountBack(myDiv, secs)

  {

    var DisplayStr;

    var DisplayFormat = "%%D%% Days %%H%%:%%M%%:%%S%%";

    DisplayStr = DisplayFormat.replace(/%%D%%/g, Calcage(secs,86400,100000));

    DisplayStr = DisplayStr.replace(/%%H%%/g, Calcage(secs,3600,24));

    DisplayStr = DisplayStr.replace(/%%M%%/g, Calcage(secs,60,60));

    DisplayStr = DisplayStr.replace(/%%S%%/g, Calcage(secs,1,60));

    if(secs > 0)

    {

      document.getElementById(myDiv).innerHTML = DisplayStr;

      setTimeout("CountBack('" + myDiv + "'," + (secs-1) + ");", 990);

    }

    else

    {

      document.getElementById(myDiv).innerHTML = "Auction Over";

    }

  }

 

</script>

</html>

 

 

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