/*

Author: Robert Hashemian

http://www.hashemian.com/



You can use this code in any manner so long as the author's

name, Web address and this disclaimer is kept intact.

********************************************************

Usage Sample:



<script language="JavaScript">

TargetDate = "12/31/2020 5:00 AM";

BackColor = "palegreen";

ForeColor = "navy";

CountActive = true;

CountStepper = -1;

LeadingZero = true;

DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";

FinishMessage = "It is finally here!";

</script>

<script language="JavaScript" src="http://scripts.hashemian.com/js/countdown.js"></script>

*/



function calcage(secs, num1, num2) {

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

  if (LeadingZero && s.length < 2)

    s = "0" + s;

  return "" + s + "";

}



function CountBack(secs) {

  if (secs < 0) {

    document.getElementById("cntdwn").innerHTML = FinishMessage;

    return;

  }

  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));



  document.getElementById("cntdwn").innerHTML = DisplayStr;

  if (CountActive)

    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);

}



function putspan(backcolor, forecolor) {

 document.write("<span id='cntdwn' style='background-color:" + backcolor + 

                "; color:" + forecolor + "'></span>");

}



if (typeof(BackColor)=="undefined")

  BackColor = "white";

if (typeof(ForeColor)=="undefined")

  ForeColor= "black";

if (typeof(TargetDate)=="undefined")

  TargetDate = "12/31/2020 5:00 AM";

if (typeof(DisplayFormat)=="undefined")

  DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";

if (typeof(CountActive)=="undefined")

  CountActive = true;

if (typeof(FinishMessage)=="undefined")

  FinishMessage = "";

if (typeof(CountStepper)!="number")

  CountStepper = -1;

if (typeof(LeadingZero)=="undefined")

  LeadingZero = true;





CountStepper = Math.ceil(CountStepper);

if (CountStepper == 0)

  CountActive = false;

var SetTimeOutPeriod = (Math.abs(CountStepper)-1)*1000 + 990;

putspan(BackColor, ForeColor);

var dthen = new Date(TargetDate);

var dnow = new Date();

if(CountStepper>0)

  ddiff = new Date(dnow-dthen);

else

  ddiff = new Date(dthen-dnow);

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

CountBack(gsecs);