<script>     

var now = new Date();                    //当前日期     

var nowDayOfWeek = now.getDay();         //今天本周的第几天     

var nowDay = now.getDate();              //当前日     

var nowMonth = now.getMonth();           //当前月     

var nowYear = now.getYear();             //当前年     

nowYear += (nowYear < 2000) ? 1900 : 0;  //     

    

//格式化日期：yyyy-MM-dd     

function formatDate(date) {      

    var myyear = date.getFullYear();     

    var mymonth = date.getMonth()+1;     

    var myweekday = date.getDate();      

         

    if(mymonth < 10){     

        mymonth = "0" + mymonth;     

    }      

    if(myweekday < 10){     

        myweekday = "0" + myweekday;     

    }     

    return (myyear+"-"+mymonth + "-" + myweekday);      

}      

    

//获得某月的天数     

function getMonthDays(myMonth){     

    var monthStartDate = new Date(nowYear, myMonth, 1);      

    var monthEndDate = new Date(nowYear, myMonth + 1, 1);      

    var   days   =   (monthEndDate   -   monthStartDate)/(1000   *   60   *   60   *   24);      

    return   days;      

}     

    

//获得本季度的开始月份     

function getQuarterStartMonth(){     

    var quarterStartMonth = 0;     

    if(nowMonth<3){     

       quarterStartMonth = 0;     

    }     

    if(2<nowMonth && nowMonth<6){     

       quarterStartMonth = 3;     

    }     

    if(5<nowMonth && nowMonth<9){     

       quarterStartMonth = 6;     

    }     

    if(nowMonth>8){     

       quarterStartMonth = 9;     

    }     

    return quarterStartMonth;     

}     

    

//获得本周的开始日期     

function getWeekStartDate() {      

    var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);      

    return formatDate(weekStartDate);     

}      

    

//获得本周的结束日期     

function getWeekEndDate() {      

    var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));      

    return formatDate(weekEndDate);     

}      

    

//获得本月的开始日期     

function getMonthStartDate(){     

    var monthStartDate = new Date(nowYear, nowMonth, 1);      

    return formatDate(monthStartDate);     

}     

    

//获得本月的结束日期     

function getMonthEndDate(){     

    var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));      

    return formatDate(monthEndDate);     

}     

    

//获得本季度的开始日期     

function getQuarterStartDate(){     

         

    var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);      

    return formatDate(quarterStartDate);     

}     

    

//或的本季度的结束日期     

function getQuarterEndDate(){     

    var quarterEndMonth = getQuarterStartMonth() + 2;     

    var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));      

    return formatDate(quarterStartDate);     

}     

    

alert(getQuarterEndDate());     

</script>