function calcage(secs, num1, num2) {

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

  if (s.length < 2)

    s = "0" + s;

  return "<b>" + s + "</b>";

}

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-1) + ")", 990);

}

function putspan(backcolor, forecolor) {
	if(backcolor=="undefined"){
		document.write("<span id='cntdwn' style='color:" + forecolor + "'></span>");
	}else{
		document.write("<span id='cntdwn' style='background-color:" + backcolor + "; color:" + forecolor + "'></span>");
	}
}

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

  BackColor = "undefined";

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 = "";

putspan(BackColor, ForeColor);

var dthen = new Date(TargetDate);

var dnow = new Date(2012,2-1,4,9,41,40);

ddiff = new Date(dthen-dnow);

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

CountBack(gsecs);