JS gets this week, this month, the start date and end date for this quarter

1<script>2 varnow =NewDate ();//Current Date3 varNowdayofweek = Now.getday ();//the day of the week today4 varNowday = Now.getdate ();//Current Day5 varNowmonth = Now.getmonth ();//Current Month6 varNowyear = Now.getyear ();//Current year7Nowyear + = (Nowyear < -) ?1900:0;//     8     9 //formatted Date: YYYY-MM-DDTen function FormatDate (date) { One     varMyyear =date.getfullyear ();  A     varMymonth = Date.getmonth () +1;  -     varMyweekday =date.getdate ();  -           the     if(Mymonth <Ten){      -Mymonth ="0"+Mymonth;  -     }       -     if(Myweekday <Ten){      +Myweekday ="0"+Myweekday;  -     }      +     return(myyear+"-"+mymonth +"-"+myweekday);  A }       at      - //get the number of days in a month - function Getmonthdays (mymonth) { -     varMonthstartdate =NewDate (Nowyear, Mymonth,1);  -     varMonthenddate =NewDate (nowyear, Mymonth +1,1);  -     varDays = (monthenddate-monthstartdate)/( +* -* -* -);  in     returnDays ;  - }      to      + //get the start month of the quarter - function Getquarterstartmonth () { the     varQuarterstartmonth =0;  *     if(nowmonth<3){      $Quarterstartmonth =0; Panax Notoginseng     }      -     if(2<nowmonth && nowmonth<6){      theQuarterstartmonth =3;  +     }      A     if(5<nowmonth && nowmonth<9){      theQuarterstartmonth =6;  +     }      -     if(nowmonth>8){      $Quarterstartmonth =9;  $     }      -     returnQuarterstartmonth;  - }      the      - //get the start date for this weekWuyi function Getweekstartdate () { the     varWeekstartdate =NewDate (Nowyear, Nowmonth, Nowday-Nowdayofweek);  -     returnformatdate (weekstartdate);  Wu }       -      About //Get the end date for this week $ function Getweekenddate () { -     varWeekenddate =NewDate (Nowyear, Nowmonth, Nowday + (6-Nowdayofweek));  -     returnformatdate (weekenddate);  - }       A      + //get the start date for this month the function Getmonthstartdate () { -     varMonthstartdate =NewDate (Nowyear, Nowmonth,1);  $     returnformatdate (monthstartdate);  the }      the      the //Get the end date for this month the function Getmonthenddate () { -     varMonthenddate =NewDate (Nowyear, Nowmonth, Getmonthdays (Nowmonth));  in     returnformatdate (monthenddate);  the }      the      About //get the start date for the quarter the function Getquarterstartdate () { the           the     varQuarterstartdate =NewDate (Nowyear, Getquarterstartmonth (),1);  +     returnformatdate (quarterstartdate);  - }      the     Bayi //or the end date of the quarter the function Getquarterenddate () { the     varQuarterendmonth = Getquarterstartmonth () +2;  -     varQuarterstartdate =NewDate (Nowyear, Quarterendmonth, Getmonthdays (Quarterendmonth));  -     returnformatdate (quarterstartdate);  the }      the      the alert (Getquarterenddate ());  the</script>

JS gets this week, this month, the start date and end date for this quarter