javascript next month date formatting coupon source code

  
function NextMonth1() {
        var now = new Date();
        if (now.getMonth() == 11) {
            return new Date(now.getFullYear() + 1, 0, 1);
        } else {
            return new Date(now.getFullYear(), now.getMonth() + 1, 1);
        }
}

function formatDate(date) {
  var monthNames = [
    "January", "February", "March",
    "April", "May", "June", "July",
    "August", "September", "October",
    "November", "December"
  ];

  var day = date.getDate();
  var monthIndex = date.getMonth();
  var year = date.getFullYear();

  return day + ' ' + monthNames[monthIndex] + ' ' + year;
}

var div = document.getElementById('couponText');
div.innerHTML += "Effective till " + formatDate(NextMonth1());