/*
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:


*/

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

function CountBack(secs) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = FinishMessage;
    return;
  }
  if (calcage(secs,604800,100000) == 0) 
  DisplayStr = DisplayFormat.replace(/%%W%%/g, "");  
  else 
  DisplayStr = DisplayFormat.replace(/%%W%%/g, calcage(secs,604800,100000) + (calcage(secs,604800,100000) == 1 ?" week,":" weeks"));

  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 = "black";
if (typeof(ForeColor)=="undefined")
  ForeColor= "white";
if (typeof(TargetDate)=="undefined")
  TargetDate = "02/09/2011 12:00 PM UTC+0000";
if (typeof(DisplayFormat)=="undefined")
  DisplayFormat = " The 21st Battersea Beer Festival opens on Wednesday 9 February 2011 - less than %%W%% to go";
if (typeof(CountActive)=="undefined")
  CountActive = true;
if (typeof(FinishMessage)=="undefined")
  FinishMessage = "The 21st Battersea Beer Festival is NOW ON - Open 12-11 Wed 09 - Fri 11 February.";
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);