/*计算指定时间的的周一和周日            return=>{mondy:Date,sundy:Date}            parms:{            date:指定时间，如果不指定则取当前时间            }            */            function getWeekArea(date) {                if (!(date instanceof Date)) {                    date = new Date();                }                var day = date.getDay(), _date = date.getDate(),                    mondy = _date - (day == 0 ? 7 : day) + 1,                    t1 = new Date(date.getTime()),                    t2 = new Date(date.getTime());                t1.setDate(mondy);                t2.setDate(mondy + 6);                return { mondy: t1, sundy: t2 };            }            function fnSetWeek(week) {                var weekArea = getWeekArea(), mondy = weekArea.mondy, sundy = weekArea.sundy, week = parseInt(week, 10);                if (isNaN(week)) {                    /*周一查上周的数据*/                    var t = new Date(), day = t.getDay();                    return fnSetWeek(day == 1 ? -1 : 0);                } else {                    mondy.setDate(mondy.getDate() + week * 7);                    sundy.setDate(sundy.getDate() + week * 7);                }                startTime.val(mondy.formatDate(dateFormat));                endTime.val(sundy.formatDate(dateFormat));            }