function countdown(obj)
{
	this.obj		= obj;
	this.TargetDate		= "12/31/2020 5:00 AM";
	this.CountActive	= true;
	
	this.DisplayStr;

	this.Calcage		= cd_CalcTime;
	this.CountBack		= cd_CountBack;
	this.Setup		= cd_Setup;
}

function cd_CalcTime(secs, num1, num2)
{
  s = ((Math.floor(secs/num1))%num2).toString();
  if (s.length < 2) s = "0" + s;
  return (s);
}
function cd_CountBack(secs)
{
  document.getElementById('day').innerHTML = this.Calcage(secs,86400,100000);
  document.getElementById('hour').innerHTML = this.Calcage(secs,3600,24);
  document.getElementById('min').innerHTML = this.Calcage(secs,60,60);
  document.getElementById('sec').innerHTML = this.Calcage(secs,1,60);
  if (this.CountActive) setTimeout(this.obj +".CountBack(" + (secs-1) + ")", 990);
}
function cd_Setup()
{
	var dthen	= new Date(this.TargetDate);
  	var dnow	= new Date();
	ddiff		= new Date(dthen-dnow);
	gsecs		= Math.floor(ddiff.valueOf()/1000);
	this.CountBack(gsecs);
}