Untitled

<!DOCTYPE html>
<html>
<head>
    <title>Demo IF</title>
    <link rel="stylesheet" type="text/css" href="BuatIf.css">
</head>
<body>
    <p>Akan muncul tulisan "Good day!" jika waktu kurang dari 18:00</p>
<p id="demo">Good Evening</p>
    <script type="text/javascript">
        if(new Date().getHours() < 18)
        {
            document.getElementById("demo").innerHTML = "Good Day!";
        }
    </script>
</body>
</html>