/*
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.
*/

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;
  }
  DisplayDay = calcage(secs,86400,100000);
  DisplayHour = calcage(secs,3600,24);
  DisplayMinute = calcage(secs,60,60);
  DisplaySecond = calcage(secs,1,60);

	$("days").innerHTML = DisplayDay+':';
	$("hours").innerHTML = DisplayHour+':';
	$("minutes").innerHTML = DisplayMinute+':';
	$("seconds").innerHTML = DisplaySecond;

  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}


if (typeof(TargetDate)=="undefined")
  TargetDate = "12/31/2020 5:00 AM";

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;

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);