remaining days in current month in javascript

<!DOCTYPE html>
<html>

<head>
        <meta charset="utf-8" />
        <title>Remaining days in current month in javascript</title>
        <script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
        <script>
                // Add your javascript here
                $(function() {
                        getRemanningDays();
                });

                var getRemanningDays = function() {
                        var date = new Date();
                        var time = new Date(date.getTime());
                        time.setMonth(date.getMonth() + 1);
                        time.setDate(0);
                        var days =time.getDate() > date.getDate() ? time.getDate() - date.getDate() : 0;
                        alert(days +' Days Remaining.');
                        $('#remainingday').html(days);
                }
        </script>
</head>

<body>
        <h1>Get Remaining days in current month in JavaScript</h1>
        <p style="color:red;">Remaining Days : <span id="remainingday"></span> days.</p>
        
</body>

</html>

/* Put your css in here */

h1 {
  color: red;
}