/*
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;
  switch (num1) {
  	case 86400: digitId = 'timerdays'; break;
  	case 3600: digitId = 'timerhours'; break;
  	case 60: digitId = 'timerminutes'; break;
  	case 1: digitId = 'timerseconds'; break;  	
  }
  return '<td id="'+digitId+'">' + s + "</td>";
}

function CountBack(secs,txtDays,txtHours,txtMinutes,txtSeconds) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = '<table><tr><td>'+FinishMessage+'</td></tr></table>';
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs,86400,100000)+'<td class="separator"></td>');
  DisplayStr = DisplayStr.replace(/%%H%%/g, calcage(secs,3600,24)+'<td class="separator"></td>');
  DisplayStr = DisplayStr.replace(/%%M%%/g, calcage(secs,60,60)+'<td class="separator"></td>');
  DisplayStr = DisplayStr.replace(/%%S%%/g, calcage(secs,1,60));

  document.getElementById("cntdwn").innerHTML = '<table><tr><td id="left"></td>'+DisplayStr+'<td id="right"></td></tr><tr><td></td><td>'+txtDays+'</td><td class="separator2"></td><td>'+txtHours+'</td><td class="separator2"></td><td>'+txtMinutes+'</td><td class="separator2"></td><td>'+txtSeconds+'</td><td></td></tr></table>';
    
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ",txtDays,txtHours,txtMinutes,txtSeconds)", SetTimeOutPeriod);
}

function putDiv() {
 document.write("<div id='cntdwn'></div>");
}

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;
putDiv();
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,txtDays,txtHours,txtMinutes,txtSeconds);