var TargetDate = '02/25/2012 05:00 PM';
var CountActive = true;
var CountStepper = -1;
var LeadingZero = true;
var DisplayFormat = "<span>%%D%%</span><span>%%H%%</span><span>%%M%%</span><span>%%S%%</span>";
var FinishMessage = "&nbsp;";

var SetTimeOutPeriod;
var dthen;
var dnow;

function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (LeadingZero && s.length < 2)
    s = "0" + s;
  return s;
  //return "<b>" + s + "</b>";
}

function CountBack(secs) {
  if (secs < 0) {
    $("#clock_wrap").html( 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));

  $("#clock_wrap").html( DisplayStr );
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}



function initCountdown() {
	
	if (typeof(TargetDate)=="undefined") TargetDate = "10/21/2012 12:00 PM";
	if (typeof(DisplayFormat)=="undefined") DisplayFormat = "<span>%%D%%</span>:<span>%%H%%</span>:<span>%%M%%</span>:<span>%%S%%</span>";
	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;
	SetTimeOutPeriod = (Math.abs(CountStepper)-1)*1000 + 990;
	dthen = new Date(TargetDate);
	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);
}

$(function(){
	initCountdown();
});