function displayDate() {

    var months = new Array(
      'Jan', 'Feb', 'Mar', 'Apr', 'May',
      'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
      'Nov', 'Dec');

    var days = new Array(
      'Sun', 'Mon', 'Tue',
      'Wed', 'Thu', 'Fri', 'Sat');


    var current_date = new Date();
    var year = current_date.getFullYear();
    var month = months[current_date.getMonth()];
    var date = current_date.getDate();
    var day = days[current_date.getDay()];
    var hour = current_date.getHours();
    var minute = current_date.getMinutes();
    var second = current_date.getSeconds();

    document.write("Today is " + day + " " + month + " " + date + ", " + year);
    document.write("<br />");

}

function greetings() {
    var current_time = new Date();
    var hour = current_time.getHours();
    if (hour < 12) {
        document.write("Good Morning! ");
    }
    else if (hour >= 12 && hour < 19) {
        document.write("Good Afternoon! ");
    }
    else {
        document.write("Good Evening! ");
    }
}