js 日期相差的天数

js 日期相差的天数

　　　　 /*js将yyyymmddhhmmss字符date计算相差天数*/
	　　function getDifDays( s1,s2 ){
		var pattern = /(d{4})(d{2})(d{2})(d{2})(d{2})(d{2})/;
		var ms = ""
		var formatedS1 = s1.replace(pattern, '$1-$2-$3 $4:$5:$6');
		var formatedS2 = s2.replace(pattern, '$1-$2-$3 $4:$5:$6');
		
		s1 = new Date(formatedS1.replace(/-/g, '/'));
        　　　　 s2 = new Date(formatedS2.replace(/-/g, '/'));
        　　　　 ms = Math.abs(s1.getTime() - s2.getTime());
        　　　　 return ms / 1000 / 60 / 60/24;
	}

       function getDifDays( s1,s2 ){
		var pattern = /(d{4})(d{2})(d{2})(d{2})(d{2})(d{2})/;
		var ms = ""
		
		s1 = new Date(s1.replace(pattern, '$1/$2/$3 $4:$5:$6'));
        s2 = new Date(s2.replace(pattern, '$1/$2/$3 $4:$5:$6'));
        ms = Math.abs(s1.getTime() - s2.getTime());
     
        return ms / 1000 / 60 / 60/24;
	}    

function  DateDiff(sDate1,  sDate2){    //sDate1和sDate2是2006-12-18格式    
          var  aDate,  oDate1,  oDate2,  iDays    
          aDate  =  sDate1.split("-")    
          oDate1  =  new  Date(aDate[1]  +  '-'  +  aDate[2]  +  '-'  +  aDate[0])    //转换为12-18-2006格式    
          aDate  =  sDate2.split("-")    
          oDate2  =  new  Date(aDate[1]  +  '-'  +  aDate[2]  +  '-'  +  aDate[0])    
          iDays  =  parseInt(Math.abs(oDate1  -  oDate2)  /  1000  /  60  /  60  /24)    //把相差的毫秒数转换为天数   
          return  iDays + 1   
      }

var day1 = (new Date).setFullYear(2011, 7, 16);
var day2 = (new Date).setFullYear(2011, 7, 20);
var number_of_days = (day2 - day1) / 86400000;