计算指定日期

计算指定日期是当月第几周

private function weekOfMonth(yyyy:Number, mm:Number, dd:Number):Number  
            {  
                var myDate=new Date(yyyy, mm - 1, dd);  
                var diff=myDate.getDate() - 1;   
                myDate.setDate(1);  
                var dateWeek=7 - myDate.getDay();   
                if (diff > dateWeek)  
                {  
                    diff-=dateWeek;   
                    var dateMod=diff % 7;   
                    if (dateMod > 0)  
                    {  
                        return (diff - dateMod) / 7 + 2;  
                    }  
                    else  
                    {  
                        return diff / 7 + 1;  
                    }  
                }  
                else  
                {  
                    return 1;  
                }  
            } 


计算指定日期是当年第几周

 

private function weekOfYear(yyyy:Number,mm:Number,dd:Number):Number{  
                var myDate =new Date(yyyy, mm - 1, dd);  
                var startDate = new Date(yyyy,0,1);  
                var diff = myDate.valueOf() - startDate.valueOf();  
                var d = Math.round(diff/86400000);  
                return Math.ceil((d + ((startDate.getDay() + 1) - 1)) / 7);  
                  
            } 


 var someDay:Date=new Date(2010,03,08);
 
    trace(someDay.day);

算出的是4月份的8号是周几 1代码周一