function distance_of_time_in_words(minutes) {
	  if (minutes.isNaN) return "";
	  minutes = Math.abs(minutes);
	  if (minutes < 1) return ('less than a minute');
	  if (minutes < 50) return (minutes + ' minute' + (minutes == 1 ? '' : 's'));
	  if (minutes < 90) return ('about one hour');
	  if (minutes < 1080) return (Math.round(minutes / 60) + ' hours');
	  if (minutes < 1440) return ('one day');