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

function CountBack(secs) {
  if (secs < 0) {
    Target.innerHTML = FinishMessage;
    return;
  }
  DisplayStr =  "<div style=\"float:left;\">"+calcage(secs,86400,100000) + "&nbsp;D&nbsp;</div>";
  DisplayStr += "<div style=\"float:left;\">"+calcage(secs,3600,24) + "&nbsp;U&nbsp;</div>";
  DisplayStr += "<div style=\"float:left;\">"+calcage(secs,60,60) + "&nbsp;M&nbsp;</div>";
  DisplayStr += "<div style=\"float:left;\">"+calcage(secs,1,60) + "&nbsp;S&nbsp;</div>";

  Target.innerHTML = DisplayStr + " Tot aan de start";
  //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(Target)=="undefined")
  Target = document.getElementById("cntdwn");
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);