function formatMsgTime (dateTimeStamp) {
		var minute =  60;
		var hour = minute * 60;
		var day = hour * 24;
		var halfamonth = day * 15;
		var month = day * 30;
		var now = new Date().getTime()/1000;
		var diffValue = now - dateTimeStamp;
		if(diffValue < 0){return;}
		var monthC =diffValue/month;
		var weekC =diffValue/(7*day);
		var dayC =diffValue/day;
		var hourC =diffValue/hour;
		var minC =diffValue/minute;
		if(monthC>=1){
			result="" + parseInt(monthC) + "月前";
		}
		else if(weekC>=1){
			result="" + parseInt(weekC) + "周前";
		}
		else if(dayC>=1){
			result=""+ parseInt(dayC) +"天前";
		}
		else if(hourC>=1){
			result=""+ parseInt(hourC) +"小時前";
		}
		else if(minC>=1){
			result=""+ parseInt(minC) +"分鐘前";
		}else
		result="剛剛";
		return result;
		};