计算时长，时间戳转换为几天几小时几分几秒

function formatDuring(mss) {
		var days = parseInt(mss / (1000 * 60 * 60 * 24));
		var hours = parseInt((mss % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
		var minutes = parseInt((mss % (1000 * 60 * 60)) / (1000 * 60));
		var seconds = ((mss % (1000 * 60)) / 1000).toFixed(0);
		return days + " 天 " + hours + " 小时 " + minutes + " 分钟 " + seconds + " 秒 ";
}