js获取相应的时间端

/** 

 * 获取当天、前几天、本周、上周、下周、本季度、本月、上月、下月的开始日期、结束日期 

 */  

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;  //    

  

var lastMonthDate = new Date();  //上月日期  

lastMonthDate.setDate(1);  

lastMonthDate.setMonth(lastMonthDate.getMonth()-1);  

var lastYear = lastMonthDate.getYear();  

var lastMonth = lastMonthDate.getMonth();  

    

//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);      

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}      

    

//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);     

}     

  

//获得上月开始时间  

function getLastMonthStartDate(){  

    var lastMonthStartDate = new Date(nowYear, lastMonth, 1);  

    return formatDate(lastMonthStartDate);    

}  

  

//获得上月结束时间  

function getLastMonthEndDate(){  

    var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));  

    return formatDate(lastMonthEndDate);    

}  

//获取最近7天日期 

function getnearseven(){

    var day1 = new Date();

    day1.setTime(day1.getTime()-7*24*60*60*1000);

    var s1 = day1.getFullYear()+"-" + (day1.getMonth()+1) + "-" + day1.getDate();

    return s1;

}    

//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);     

} 

//获取上周下周数据//获取上周开始时间以及下周结束时间

function startWeek(oneDay) { 
var weekStartDate = new Date(oneDay.getFullYear(), oneDay.getMonth(), oneDay.getDate()- oneDay.getDay());
return formatDate(weekStartDate); 

} 

function nextWeek(oneDay) { 
var weekEndDate = new Date(oneDay.getFullYear(), oneDay.getMonth(), oneDay.getDate()+ (6 - oneDay.getDay())); 
return formatDate(weekEndDate); 

}

var  cur_Day=new Date();

//1.获取上周开始时间以及下周结束时间

$("#lastWeekDate").click(function(){

cur_Day.setDate(cur_Day.getDate()+7);

console.log(startWeek(cur_Day))

console.log(nextWeek(cur_Day))

})

//2.获取下周开始时间以及结束时间；

$("#nextWeekDate").click(function(){

cur_Day.setDate(cur_Day.getDate()-7);

console.log(startWeek(cur_Day))

console.log(nextWeek(cur_Day))

})