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

You can use this code in any manner so long as the author's
name, Web address and this disclaimer is kept intact.
********************************************************
Usage Sample:

<script language="JavaScript">
TargetDate = "12/31/2020 5:00 AM";
BackColor = "palegreen";
ForeColor = "navy";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
FinishMessage = "It is finally here!";
</script>
<script language="JavaScript" src="http://scripts.hashemian.com/js/countdown.js"></script>
*/

function getDays(secs, num1, num2)
{
	return ((Math.floor(secs / num1)) % num2);
}

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 ((typeof (CountDownId) == 'undefined') || (document.getElementById(CountDownId) == 'undefined'))
		return;
	if (secs < 0)
	{
		document.getElementById(CountDownId).innerHTML = FinishMessage;
		return;
	}

	var myDays = getDays(secs, 86400, 100000);
	if (myDays > 0)
		DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs, 86400, 100000));
	else
		DisplayStr = DisplayFormat.replace('%%D%% d', '');
	
	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));

	if ((typeof (CountDownId) != 'undefined') && (document.getElementById(CountDownId)))
		document.getElementById(CountDownId).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);