获取本月最后一天

获取本月最后一天

var now = getItemValueAsDate("时间");  //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 monthStartDate = new Date(nowYear, nowMonth, 1);
var monthEndDate = new Date(nowYear, nowMonth + 1, 1);
var days = (monthEndDate - monthStartDate) / (1000 * 60 * 60 * 24);
var monthEndDate2 = new Date(nowYear, nowMonth, days);


var myyear = monthEndDate2.getFullYear();
var mymonth = monthEndDate2.getMonth() + 1;
var myweekday = monthEndDate2.getDate();

if (mymonth < 10) {
    mymonth = "0" + mymonth;
}
if (myweekday < 10) {
    myweekday = "0" + myweekday;
}
myyear + "-" + mymonth + "-" + myweekday;