计算指定日期

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#date #function #2010

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