var SetTimeOutPeriod, dthen, dnow;
var d = new Date();
var s = d.getTime(); 

function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (LeadingZero && s.length < 2)
    s = "0" + s;
  return s*1;
}
function countdown(){

	var serverdate = '';
	new Ajax.Request('/system/serversync?t=' + s, {
			method: 'post',
			parameters: {sync: 'now'},
			onComplete: function( request ) {
	       	serverdate = request.responseText;
	       	dnow = new Date(serverdate);
	       	init_CountBack();
	       
	        }
	    }
	);
	

}


function init_CountBack(){

	if (typeof(BackColor)=="undefined")
	  BackColor = "white";
	if (typeof(ForeColor)=="undefined")
	  ForeColor= "black";
	if (typeof(TargetDate)=="undefined")
	  TargetDate = "04/02/2011 8:30 PM";
	if (typeof(DisplayFormat)=="undefined")
	  DisplayFormat = "%%D%% nap, %%H%% óra, %%M%% perc, %%S%% másodperc";
	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;
	dthen = new Date(TargetDate);
	if(CountStepper>0)
	  ddiff = new Date(dnow-dthen);
	else
	  ddiff = new Date(dthen-dnow);
	gsecs = Math.floor(ddiff.valueOf()/1000);


	CountBack(gsecs);
}
function CountBack(secs) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = FinishMessage;
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs,86400,100000) )//.replace("0", "");
  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);
}