/*
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 = "01/19/2010 7:00 PM";
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://youlearntwitface.com/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));
  
  // seconds
  var Seconds = calcage(secs,1,60);
  var S1 = Seconds.substr(0,1);
  var S2 = Seconds.substr(1,1);
  document.getElementById('clocknumber6').className = 'clocknumber'+S1;
  document.getElementById('clocknumber7').className = 'clocknumber'+S2;
  
  var Minutes = calcage(secs,60,60);
  var M1 = Minutes.substr(0,1);
  var M2 = Minutes.substr(1,1);
  document.getElementById('clocknumber4').className = 'clocknumber'+M1;
  document.getElementById('clocknumber5').className = 'clocknumber'+M2;
  
  var Hours = calcage(secs,3600,24);
  var H1 = Hours.substr(0,1);
  var H2 = Hours.substr(1,1);
  document.getElementById('clocknumber2').className = 'clocknumber'+H1;
  document.getElementById('clocknumber3').className = 'clocknumber'+H2;
  
  var Days = calcage(secs,86400,100000);
  var D1 = Days.substr(0,1);
  var D2 = Days.substr(1,1);
  document.getElementById('clocknumber0').className = 'clocknumber'+D1;
  document.getElementById('clocknumber1').className = 'clocknumber'+D2;

//  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);