OIC JS - return last day

Object: Return last day of the month in this format yyyy-mm-dd

Js codes:

function returnLastDay(){

var date = new Date(), y = date.getFullYear(), m = date.getMonth();

var lastDate = new Date(y, m + 1, 0);

var day = lastDate.getDate();

var month = lastDate.getMonth() + 1;

var year = lastDate.getFullYear();

if ( parseInt(month) < 10 ) {

var newMonth = "0" + month;

}

else { 

var newMonth = month;

}

if ( parseInt(day) < 10 ) {

var newDay = "0" + day;

}

else { 

var newDay = day;

}

var lastday = year + "-" + newMonth + "-" + newDay;

return lastday;

}

Note : 

getMonth() method returns the months from 0 to 11. January is the 0 and February is 1 and so on...

firstDay = new Date(y, m, 1)

lastDay = new Date(y, m+1, 0)