js获取上个月的时间.txt

function dealTimeFormatter(value,row,index){
		if(value==null){
			return "";
		}
		var day=Math.floor(value/(24*60*60*1000));
		var ho='';
		var mi='';
		if(day>0){
			ho=Math.floor((value-(24*60*60*1000*day))/(60*60*1000));
			if(ho>0){
				mi=Math.floor((value-(24*60*60*1000*day)-(60*60*1000*ho))/(60*1000));
			}else{
				mi=Math.floor((value-(24*60*60*1000*day))/(60*1000));
			}
		}else{
			ho=Math.floor(value/(60*60*1000));
			if(ho>0){
				mi=Math.floor((value-(60*60*1000*ho))/(60*1000));
			}else{
				mi=Math.floor(value/(60*1000));
			}
		}
		if(day>0){
			day+='天';
		}else{
			day='';
		}
		if(ho>0){
			ho+='小时';
		}else{
			ho='';
		}
		if(mi>0){
			mi+='分钟';
		}else{
			mi='';
		}
		return (day+ho+mi)==''?'1分钟':(day+ho+mi);
		}
	
	//获取下个月的时间
	function lastMonthDate(){
		     var Nowdate = new Date();
		     var vYear = Nowdate.getFullYear();
		     var vMon = Nowdate.getMonth() + 1;
		     var vDay = Nowdate.getDate();
		     
		     //每个月的最后一天日期（为了使用月份便于查找，数组第一位设为0）
		     var daysInMonth = new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
		     if(vMon==1){
		         vYear = Nowdate.getFullYear()-1;
		         vMon = 12;
		     }else{
		         vMon = vMon -1;
		     }
		     if(vYear%4 == 0 && vYear%100 != 0){//若是闰年，二月最后一天是29号
		         daysInMonth[2]= 29;
		     }
		     if(daysInMonth[vMon] < vDay){
		         vDay = daysInMonth[vMon];
		     }
		     if(vDay<10){
		         vDay="0"+vDay;
		     }
		     if(vMon<10){
		         vMon="0"+vMon;
		     }
		     var date =vYear+"-"+ vMon +"-"+vDay;
		     console.log(date)
		     return date;
		 }