/*
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.
********************************************************
*/

(function() {

var TargetDate, BackColor, ForeColor,
	CountActive, CountStepper, LeadingZero,
	DisplayFormat, FinishMessage, SetTimeOutPeriod;

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(function() {
		CountBack(secs+CountStepper)
	}, SetTimeOutPeriod);
  }
}

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

function countdown(options) {
	options = options || { };
	
	BackColor = options.BackColor;
	ForeColor = options.ForeColor;
	TargetDate = options.TargetDate;
	DisplayFormat = options.DisplayFormat;
	CountActive = options.CountActive;
	FinishMessage = options.FinishMessage;
	CountStepper = options.CountStepper;
	LeadingZero = options.LeadingZero;

	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;
	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);
}

window.countdown = countdown;

}());