/*Usage Sample:
<script language="JavaScript">
TargetDate = "<%=@yourDateTimeVar%>";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
FinishMessage = "Hey It's the end";
</script>
Place <span id="cntdown></span> where the counter must apear
and <%= javascript_include_tag 'countdown' %> at bottom of the page
*/

function calcule(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) {
		$('cntdwn').update(FinishMessage)
		$("option").hide(); 
		$('dod_closed').show();
		//Sound.play('/images/explose.wav');
		//alert(DisplayFormat);
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcule(secs,86400,100000));
  DisplayStr = DisplayStr.replace(/%%H%%/g, calcule(secs,3600,24));
  DisplayStr = DisplayStr.replace(/%%M%%/g, calcule(secs,60,60));
  DisplayStr = DisplayStr.replace(/%%S%%/g, calcule(secs,1,60));

	$("cntdwn").update(DisplayStr);
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}

//Sound.play('/images/tick_tock.mp3');

if (typeof(TargetDate)=="undefined")
  TargetDate = "1/1/2010 0:00 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;
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);
//alert(TargetDate+" "+dnow);
CountBack(gsecs);