Como mejorar este codigo para poder realizar varias cuenta atras a la vez

[victor5atodogas]

Actualmente tengo este codigo:

Código:

<script language="JavaScript"> 
TargetDate = "08/31/2011 12:00 PM UTC-0500";
BackColor = "white";
ForeColor = "black";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% %%H%% %%M%% %%S%%";
FinishMessage = "Oferta Finalizada";
</script>

<script language="JavaScript" src="/hierbas/themes/hierbas/js/descontando.js"></script>

El codigo de descontando.js es:

Código:

/*
Author: Robert Hashemian
http://www.hashemian.com/

Traslator spanish: Josep Campanales
http://buscodescargas.com/

Se puede utilizar este código en cualquier manera 
siempre que el nombre del autor, dirección web y 
ésta denegación se mantengan intactos.
********************************************************
Usage Sample:

<script language="JavaScript">
TargetDate = "12/31/2040 5:00 AM";
BackColor = "palegreen";
ForeColor = "navy";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
FinishMessage = "¡por fin ya está aquí!";
</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;
  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+CountStepper) + ")", SetTimeOutPeriod);
}

function putspan(backcolor, forecolor) {
 document.write("<span id='cntdwn'></span>");
}

if (typeof(TargetDate)=="undefined")
  TargetDate = "12/31/2040 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);

Me gustaria saber si me podeis ayudar un poquito para lograr varias cuentras atras a la vez, y poderlas colocar en distintos sitios.

Muchas gracias.

Un saludo.