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' 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);