//转自http://blog.csdn.net/xc_young/article/details/16878849，其上季度有错误，已修改        var MrYangUtil = function () {            this.getCurrentDate = function () {                return new Date();            };            this.getCurrentWeek = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //返回date是一周中的某一天                  var week = currentDate.getDay();                //返回date是一个月中的某一天                  var month = currentDate.getDate();                //一天的毫秒数                  var millisecond = 1000 * 60 * 60 * 24;                //减去的天数                  var minusDay = week != 0 ? week - 1 : 6;                //alert(minusDay);                  //本周 周一                  var monday = new Date(currentDate.getTime() - (minusDay * millisecond));                //本周 周日                  var sunday = new Date(monday.getTime() + (6 * millisecond));                //添加本周时间                  startStop.push(monday);//本周起始时间                  //添加本周最后一天时间                  startStop.push(sunday);//本周终止时间                  //返回                  return startStop;            };            this.getCurrentMonth = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前月份0-11                  var currentMonth = currentDate.getMonth();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                //求出本月第一天                  var firstDay = new Date(currentYear, currentMonth, 1);                //当为12月的时候年份需要加1                  //月份需要更新为0 也就是下一年的第一个月                  if (currentMonth == 11) {                    currentYear++;                    currentMonth = 0;//就为                  } else {                    //否则只是月份增加,以便求的下一月的第一天                      currentMonth++;                }                //一天的毫秒数                  var millisecond = 1000 * 60 * 60 * 24;                //下月的第一天                  var nextMonthDayOne = new Date(currentYear, currentMonth, 1);                //求出上月的最后一天                  var lastDay = new Date(nextMonthDayOne.getTime() - millisecond);                //添加至数组中返回                  startStop.push(firstDay);                startStop.push(lastDay);                //返回                  return startStop;            };            this.getQuarterSeasonStartMonth = function (month) {                var quarterMonthStart = 0;                var spring = 0; //春                  var summer = 3; //夏                  var fall = 6;   //秋                  var winter = 9;//冬                  //月份从0-11                  if (month < 3) {                    return spring;                }                if (month < 6) {                    return summer;                }                if (month < 9) {                    return fall;                }                return winter;            };            this.getMonthDays = function (year, month) {                //本月第一天 1-31                  var relativeDate = new Date(year, month, 1);                //获得当前月份0-11                  var relativeMonth = relativeDate.getMonth();                //获得当前年份4位年                  var relativeYear = relativeDate.getFullYear();                //当为12月的时候年份需要加1                  //月份需要更新为0 也就是下一年的第一个月                  if (relativeMonth == 11) {                    relativeYear++;                    relativeMonth = 0;                } else {                    //否则只是月份增加,以便求的下一月的第一天                      relativeMonth++;                }                //一天的毫秒数                  var millisecond = 1000 * 60 * 60 * 24;                //下月的第一天                  var nextMonthDayOne = new Date(relativeYear, relativeMonth, 1);                //返回得到上月的最后一天,也就是本月总天数                  return new Date(nextMonthDayOne.getTime() - millisecond).getDate();            };            this.getCurrentSeason = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前月份0-11                  var currentMonth = currentDate.getMonth();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                //获得本季度开始月份                  var quarterSeasonStartMonth = this.getQuarterSeasonStartMonth(currentMonth);                //获得本季度结束月份                  var quarterSeasonEndMonth = quarterSeasonStartMonth + 2;                //获得本季度开始的日期                  var quarterSeasonStartDate = new Date(currentYear, quarterSeasonStartMonth, 1);                //获得本季度结束的日期                  var quarterSeasonEndDate = new Date(currentYear, quarterSeasonEndMonth, this.getMonthDays(currentYear, quarterSeasonEndMonth));                //加入数组返回                  startStop.push(quarterSeasonStartDate);                startStop.push(quarterSeasonEndDate);                //返回                  return startStop;            };            this.getCurrentYear = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                //本年第一天                  var currentYearFirstDate = new Date(currentYear, 0, 1);                //本年最后一天                  var currentYearLastDate = new Date(currentYear, 11, 31);                //添加至数组                  startStop.push(currentYearFirstDate);                startStop.push(currentYearLastDate);                //返回                  return startStop;            };            this.getPriorMonthFirstDay = function (year, month) {                //年份为0代表,是本年的第一月,所以不能减                  if (month == 0) {                    month = 11;//月份为上年的最后月份                      year--;//年份减1                      return new Date(year, month, 1);                }                //否则,只减去月份                  month--;                return new Date(year, month, 1);;            };            this.getPreviousMonth = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前月份0-11                  var currentMonth = currentDate.getMonth();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                //获得上一个月的第一天                  var priorMonthFirstDay = this.getPriorMonthFirstDay(currentYear, currentMonth);                //获得上一月的最后一天                  var priorMonthLastDay = new Date(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth(), this.getMonthDays(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth()));                //添加至数组                  startStop.push(priorMonthFirstDay);                startStop.push(priorMonthLastDay);                //返回                  return startStop;            };            this.getPreviousWeek = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //返回date是一周中的某一天                  var week = currentDate.getDay();                //返回date是一个月中的某一天                  var month = currentDate.getDate();                //一天的毫秒数                  var millisecond = 1000 * 60 * 60 * 24;                //减去的天数                  var minusDay = week != 0 ? week - 1 : 6;                //获得当前周的第一天                  var currentWeekDayOne = new Date(currentDate.getTime() - (millisecond * minusDay));                //上周最后一天即本周开始的前一天                  var priorWeekLastDay = new Date(currentWeekDayOne.getTime() - millisecond);                //上周的第一天                  var priorWeekFirstDay = new Date(priorWeekLastDay.getTime() - (millisecond * 6));                //添加至数组                  startStop.push(priorWeekFirstDay);                startStop.push(priorWeekLastDay);                return startStop;            };            this.getPriorSeasonFirstDay = function (year, month) {                var quarterMonthStart = 0;                var spring = 0; //春                  var summer = 3; //夏                  var fall = 6;   //秋                  var winter = 9;//冬                                //月份从0-11                  switch (Math.floor(month/3)) {//季度的其实月份                      case 0:                        //如果是第一季度则应该到去年的冬季                          year--;                        month = winter;                        break;                    case 1:                        month = spring;                        break;                    case 2:                        month = summer;                        break;                    case 3:                        month = fall;                        break;                };                return new Date(year, month, 1);            };            this.getPreviousSeason = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前月份0-11                  var currentMonth = currentDate.getMonth();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                //上季度的第一天                  var priorSeasonFirstDay = this.getPriorSeasonFirstDay(currentYear, currentMonth);                //上季度的最后一天                  var priorSeasonLastDay = new Date(priorSeasonFirstDay.getFullYear(), priorSeasonFirstDay.getMonth() + 2, this.getMonthDays(priorSeasonFirstDay.getFullYear(), priorSeasonFirstDay.getMonth() + 2));                //添加至数组                  startStop.push(priorSeasonFirstDay);                startStop.push(priorSeasonLastDay);                return startStop;            };            this.getPreviousYear = function () {                //起止日期数组                  var startStop = new Array();                //获取当前时间                  var currentDate = this.getCurrentDate();                //获得当前年份4位年                  var currentYear = currentDate.getFullYear();                currentYear--;                var priorYearFirstDay = new Date(currentYear, 0, 1);                var priorYearLastDay = new Date(currentYear, 11, 31);                //添加至数组                  startStop.push(priorYearFirstDay);                startStop.push(priorYearLastDay);                return startStop;            };        };

//csdn 的 Meizz  /**        * 对Date的扩展，将 Date 转化为指定格式的String        * 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q) 可以用 1-2 个占位符        * 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字)        * eg:        * (new Date()).pattern("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423        * (new Date()).pattern("yyyy-MM-dd E HH:mm:ss") ==> 2009-03-10 二 20:09:04        * (new Date()).pattern("yyyy-MM-dd EE hh:mm:ss") ==> 2009-03-10 周二 08:09:04        * (new Date()).pattern("yyyy-MM-dd EEE hh:mm:ss") ==> 2009-03-10 星期二 08:09:04        * (new Date()).pattern("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18        */        Date.prototype.pattern = function (fmt) {            var o = {                "M+": this.getMonth() + 1, //月份                           "d+": this.getDate(), //日                           "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时                           "H+": this.getHours(), //小时                           "m+": this.getMinutes(), //分                           "s+": this.getSeconds(), //秒                           "q+": Math.floor((this.getMonth() + 3) / 3), //季度                           "S": this.getMilliseconds() //毫秒                       };            var week = {                "0": "/u65e5",                "1": "/u4e00",                "2": "/u4e8c",                "3": "/u4e09",                "4": "/u56db",                "5": "/u4e94",                "6": "/u516d"            };            if (/(y+)/.test(fmt)) {                fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));            }            if (/(E+)/.test(fmt)) {                fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "/u661f/u671f" : "/u5468") : "") + week[this.getDay() + ""]);            }            for (var k in o) {                if (new RegExp("(" + k + ")").test(fmt)) {                    fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));                }            }            return fmt;        }

var my = new MrYangUtil();        window.onload = function () {            var sIpt = document.getElementById(‘sDate‘);            var eIpt = document.getElementById(‘eDate‘);                        document.getElementById(‘sel‘).onchange = function () {                switch (this.value) {                    case "cw":                        sIpt.value = my.getCurrentWeek()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getCurrentWeek()[1].pattern("yyyy-MM-dd");                        break;                    case "pw":                        sIpt.value = my.getPreviousWeek()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getPreviousWeek()[1].pattern("yyyy-MM-dd");                        break;                    case "cm":                        sIpt.value = my.getCurrentMonth()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getCurrentMonth()[1].pattern("yyyy-MM-dd");                        break;                    case "pm":                        sIpt.value = my.getPreviousMonth()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getPreviousMonth()[1].pattern("yyyy-MM-dd");                        break;                    case "cq":                        sIpt.value = my.getCurrentSeason()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getCurrentSeason()[1].pattern("yyyy-MM-dd");                        break;                    case "pq":                        sIpt.value = my.getPreviousSeason()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getPreviousSeason()[1].pattern("yyyy-MM-dd");                        break;                    case "cy":                        sIpt.value = my.getCurrentYear()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getCurrentYear()[1].pattern("yyyy-MM-dd");                        break;                    case "py":                        sIpt.value = my.getPreviousYear()[0].pattern("yyyy-MM-dd");                        eIpt.value = my.getPreviousYear()[1].pattern("yyyy-MM-dd");                        break;                    default:                        break;                }            };        };

 <select id="sel">        <option value="http://www.mamicode.com/cw">本周</option>        <option value="http://www.mamicode.com/pw">上周</option>        <option value="http://www.mamicode.com/cm">本月</option>        <option value="http://www.mamicode.com/pm">上月</option>        <option value="http://www.mamicode.com/cq">本季</option>        <option value="http://www.mamicode.com/pq">上季</option>        <option value="http://www.mamicode.com/cy">本年</option>        <option value="http://www.mamicode.com/py">上年</option>    </select><br /><br/>    <input type="text" name="name" value="http://www.mamicode.com/" id="sDate" />至    <input type="text" name="name" value="http://www.mamicode.com/" id="eDate" />