Js obtains the date of the last day of the month.

[Javascript] // obtain functiongetLastDay (year, month) {varnew_yearyear; // obtain the current year varnew_monthmonth ++; // obtain the first day of the next month, easy to calculate (not fixed on the last day) if (mont... syntaxH [javascript]
// Obtain the last day of a month
Function getLastDay (year, month ){
Var new_year = year; // returns the current year.
Var new_month = month ++; // obtain the first day of the next month for easy calculation (the last day is not fixed)
If (month> 12 ){
New_month-= 12; // month minus
New_year ++; // year increase
}
Var new_date = new Date (new_year, new_month, 1); // obtain the first day of the current month.
Return (new Date (new_date.getTime ()-1000*60*60*24). getDate (); // obtain the Date of the last day of the month
}