最近要在页面上加一个时间段的选择控件，便上网搜寻一番，但找到的答案大都没有考虑时间段跨年的情况，所以做了些修改
本周的开始和结束日期
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//当前日期var
now = new
Date();//今天是一周的第几天var
nowDayForWeek = now.getDay() === 0 ? 7 : now.getDay();var
oneDay = 1000 * 60 * 60 * 24;//本周开始日期var
weekStartDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 1));//本周结束日期(本周开始日期 + 6天)var
weekEndDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 7)); |
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//上周开始日期(当前日期 - 7天 - 今天是一周的第几天)var
lastWeekStartDay = new
Date(now.getTime() - oneDay * (nowDayForWeek + 6));//上周结束日期(当前日期 - 今天是一周的第几天)var
weekEndDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 7)); |
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var
nowMonth = now.getMonth();var
nowYear = now.getFullYear();function
getMonthDays (year, month){ var
monthStartDay = new
Date(year, month, 1); var
monthEndDate = new
Date(year, month + 1, 1); var
days = (monthStartDay - monthEndDate) / oneDay; return
days;}//本月开始日期var
monthStartDay = new
Date(nowYear ,nowMonth ,1);//本月结束日期var
monthEndDay = new
Date(nowYear ,nowMonth ,getMonthDays(nowYear ,nowMonth)); |
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var
lastMonth = (nowMonth - 1) === -1 ? 11 : (nowMonth -1);var
lastMonthYear = lastMonth === 11 ? (nowYear -1) : nowYear;//上月开始日期var
lastMonthStartDay = new
Date(lastMonthYear ,lastMonth ,1);//上月结束日期var
lastMonthEndDay = new
Date(lastMonthYear ,lastMonth ,getMonthDays(lastMonthYear ,lastMonth)); |
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function
getQuarterStartMonth (month){ var
quarterStartMonth = 0; if(month < 3){ quarterStartMonth = 0; } if(2 < month && month < 6){ quarterStartMonth = 3; } if(5 < month && month < 9){ quarterStartMonth = 6; } if(8 < month){ quarterStartMonth = 9; } return
quarterStartMonth;}//本季度开始日期var
quarterStartday= new
Date(nowYear ,getQuarterStartMonth(nowMonth),1);//本季度结束日期var
quarterEndday= new
Date(nowYear ,getQuarterStartMonth(nowMonth) + 2 ,getMonthDays(nowYear ,getQuarterStartMonth(nowMonth) + 2)); |
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var
lastQuarterMonth = (getQuarterStartMonth(nowMonth) - 3) < 0 ? 9 : getQuarterStartMonth(nowMonth - 3);var
lastQuarterYear = lastQuarterMonth === 9 ? nowYear - 1 : nowYear;//上季度开始日期var
lastQuarterStartday = new
Date(lastQuarterYear ,lastQuarterMonth ,1);//上季度结束日期var
lastQuarterEndday = new
Date(lastQuarterYear ,lastQuarterMonth + 2 ,getMonthDays(lastQuarterYear ,lastQuarterMonth + 2); |
javascript的时间段选择,布布扣,bubuko.com
原文：http://www.cnblogs.com/keloo/p/3729570.html