var millisInASecond = 1000;
var timers;
var sp = ', ';


function getFormattedTime(timeInSeconds) {

	var days = Math.floor(timeInSeconds / (60 * 60 * 24));
	timeInSeconds %= (60 * 60 * 24);
	var formattedDays = getFormattedTimeUnits(days, 'day', 'days', true);	
	formattedTime += formattedDays;
	var hours = Math.floor(timeInSeconds / (60 * 60));
	timeInSeconds %= (60 * 60);
	var formattedHours = getFormattedTimeUnits(hours, 'hour', 'hours', true);	
	var minutes = Math.floor(timeInSeconds / 60);
	timeInSeconds %= 60;
	var formattedMinutes = getFormattedTimeUnits(minutes, 'minute', 'minutes', true);	
	var seconds = timeInSeconds;
	var formattedSeconds = getFormattedTimeUnits(seconds, 'second', 'seconds', false);
	
	var formattedTime = formattedDays + formattedHours + formattedMinutes + formattedSeconds;
	return formattedTime;
}


function getFormattedTimeUnits(timeUnits, singularSuffix, plurialSuffix, appendSeparator) {
	return (timeUnits == 0)? '' : timeUnits+' '+getTimeUnitsSuffix(timeUnits, singularSuffix, plurialSuffix)+(appendSeparator?sp:''); 

}

function getTimeUnitsSuffix(timeUnits, singularSuffix, plurialSuffix) {
	return (timeUnits == 1)? singularSuffix : plurialSuffix;	
}




	
function countDownTimer(timer) {
	var time = timer.getAttribute('value') - 1;
	timer.setAttribute('value', time);	
	updateTimer(timer);
}	
	

function updateTimer(timer) {
	var	remainingTime = timer.getAttribute('value');

	if(remainingTime <= 0) 
		window.location.reload();
	
	else 
		timer.innerHTML = getFormattedTime(remainingTime);	

}	
	
function updateTimers() {
	for(var i=0; i<timers.length; i++) 
		updateTimer(timers[i]);
}	

function countDownTimers() {
	for(var i=0; i<timers.length; i++) 
		countDownTimer(timers[i]);
}		


function runTimers() {
	timers = document.getElementsByTagName('var');
	if(timers!=null) {
		
		updateTimers();
		window.setInterval('countDownTimers()', millisInASecond);
	}
}