function countdown(start, stop) {
	var days = (stop - start)/(1000*60*60*24)
	var hours = (days - Math.floor(days))*24;
	var minutes = (hours - Math.floor(hours))*60;
	var seconds = (minutes - Math.floor(minutes))*60;
	return Math.floor(days) + " Days " + Math.floor(hours) + " Hrs " + Math.floor(minutes) + 
	" Min " + Math.ceil(seconds) + " sec ";
}