JavaScript/greeting-message.html at master · eliCoding/JavaScript · GitHub

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<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>Greeting Message</title>
    <script type="text/javascript">
        //1. Declaration
        var name; //String entered by the user
        var today; //Stroe date object
        var theHour; //contains current hour

        //2. Initialization
        name = window.prompt("Please enter your name", " Elmira");
        today = new Date();
        theHour = today.getHours();
        //3.Proccessing
        //determine if it is morning
        if (theHour < 12) {
            document.writeln("<h2> Good Morning, ");
        }
        //determing whether the time is PM
        if (theHour >= 12) {
            //convert to 12 format hour clock
            theHour = theHour - 12;
            //determine whether it is before 6 pm
            if (theHour < 6) {
                document.writeln("<h2> Good Afternoon, ");
            }
            if (theHour >= 6) {
                document.writeln("<h2> Good evening, ");
            }

        }//end outer if whether it is after 6 pm

        //4 . Out put
        document.writeln(name + " , Welcome back! </h2>");


    </script>
</head>
<body>

</body>
</html>