/********************************
	 Conference Countdown
 
	 (c) 2006 MJ Bytes Ltd.
	 Written by Miro Jurik

	 JavaScript 1.0 and higher
*********************************/

// Constants
var SYDNEY		=	0x000000
var MELBOURNE	= 	0x000001
var CANBERRA	=	0x000002
var HOBART		=	0x000004
var BRISBANE	=	0x000008
var PERTH		=	0x000016
var ADELAIDE	=	0x000032
var DARWIN		=	0x000064

//Conference Details
var conferenceDate = "November 30, 2008";
var conferenceTime = "09:00:00";
var city = MELBOURNE;
var running = false;
var tm;


function startCountdown() 
{
	stopCountdown();
	displayCountdown();
}

function stopCountdown()
{
	if (running) clearTimeout(tm);
	running = false;
}

function displayCountdown() 
{
		var conference = new Date(conferenceDate + " " + conferenceTime + " " + getTimeOffset(city));
        var now = new Date();
		var togo = conference.getTime() - now.getTime();
		var multi_x = 60 * 1000;
		var multi_y = 60 * multi_x;
		
		var days = Math.floor(togo / (24 * multi_y));
		var hours = Math.floor((togo / (multi_y)) - days * 24);
	 	var minutes = Math.floor((togo - (hours * multi_y + days * 24 * multi_y)) / multi_x);
		var seconds = Math.floor((togo - (minutes * multi_x + hours * multi_y + days * 24 * multi_y)) / 1000);
		
		if (days < 0)
		{
			stopCountdown();
		}
		else
		{
			d = getElement("days");
			h = getElement("hours");
			m = getElement("minutes");
			s = getElement("seconds");
			
			d.innerHTML = days;
			h.innerHTML = hours < 10 ? "0" + hours : hours;
			m.innerHTML = minutes < 10 ? "0" + minutes: minutes;
			s.innerHTML = seconds < 10 ? "0" + seconds : seconds;
		
			tm = setTimeout("displayCountdown()", 1000);
			running = true;
		}
}

function getTimeOffset()
{
	if (city == SYDNEY || city == MELBOURNE || city == CANBERRA || city == HOBART || city == BRISBANE) return "UTC+1000";
	else if (city == PERTH) return "UTC+0800";
	else if (city == ADELAIDE || city == DARWIN) return "UTC+0930";
	else return "UTC+1000";
}

function getElement(element)
{
	return document.getElementById 
	? document.getElementById(element) : document.all 
	? document.all[element] : document.layers 
	? document.layers[element] : -1;
}