/*
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 "<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);

 function StartCountDown(myDiv,myTargetDate)
  {
    var dthen	= new Date(myTargetDate);
    var dnow	= new Date();
    ddiff		= new Date(dthen-dnow);
    gsecs		= Math.floor(ddiff.valueOf()/1000);
    CountBack(myDiv,gsecs);
  }

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

  function CountBack(myDiv, secs)
  {
    var DisplayStr;
    var DisplayFormat = "<strong>%%D%%</strong> Dní <strong>%%H%%</strong>h <strong>%%M%%</strong>m <strong>%%S%%</strong>s";
    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));
    if(secs > 0)
    {
      document.getElementById(myDiv).innerHTML = DisplayStr;
      setTimeout("CountBack('" + myDiv + "'," + (secs-1) + ");", 990);
    }
    else
    {
      document.getElementById(myDiv).innerHTML = "Akce je ukončena";
      alert (secs);
    }
  }