``###JS获取上月，本月，下月的开始时间与结束时间(记录)

//获取当天的时间

function getToday() {

var date = new Date();

return date .getFullYear() + "-" + (date .getMonth()+1) + "-" + date .getDate() ;

}

/**

* 获得相对当前周AddWeekCount个周的起止日期

* AddWeekCount为0代表当前周 为-1代表上一个周 为1代表下一个周以此类推

* **/

function getWeekStartAndEnd(AddWeekCount) {

//起止日期数组

var startStop = new Array();

//一天的毫秒数

var millisecond = 1000 * 60 * 60 * 24;

//获取当前时间

var currentDate = new Date();

//相对于当前日期AddWeekCount个周的日期

currentDate = new Date(currentDate.getTime() + (millisecond * 7*AddWeekCount));

//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();

//减去的天数

var minusDay = week != 0 ? week - 1 : 6;

//获得当前周的第一天

var currentWeekFirstDay = new Date(currentDate.getTime() - (millisecond * minusDay));

//获得当前周的最后一天

var currentWeekLastDay = new Date(currentWeekFirstDay.getTime() + (millisecond * 6));

//添加至数组

startStop.push(getDateStr3(currentWeekFirstDay));

startStop.push(getDateStr3(currentWeekLastDay));

return startStop;

}

/**

* 获得相对当月AddMonthCount个月的起止日期

* AddMonthCount为0 代表当月 为-1代表上一个月 为1代表下一个月 以此类推

* ***/

function getMonthStartAndEnd(AddMonthCount) {

//起止日期数组

var startStop = new Array();

//获取当前时间

var currentDate = new Date();

var month=currentDate.getMonth()+AddMonthCount;

if(month<0){

var n = parseInt((-month)/12);

month += n*12;

currentDate.setFullYear(currentDate.getFullYear()-n);

}

currentDate = new Date(currentDate.setMonth(month));

//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 currentMonthFirstDay = new Date(currentYear, currentMonth,1);

//获得上一月的最后一天

var currentMonthLastDay = new Date(currentYear, currentMonth+1, 0);

//添加至数组

startStop.push(getDateStr3(currentMonthFirstDay));

startStop.push(getDateStr3(currentMonthLastDay));

//返回

return startStop;

}

//获取当前日期yy-mm-dd

//date 为时间对象

function getDateStr3(date) {

var year = "";

var month = "";

var day = "";

var now = date;

year = ""+now.getFullYear();

if((now.getMonth()+1)<10){

month = "0"+(now.getMonth()+1);

}else{

month = ""+(now.getMonth()+1);

}

if((now.getDate())<10){

day = "0"+(now.getDate());

}else{

day = ""+(now.getDate());

}

return year+"-"+month+"-"+day;

}