<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript Strings</title>
    <script>
        function displayString() {
            let message = "Hello, this is a dynamic string!";
            document.getElementById("output").innerHTML = message;
        }
    </script>
</head>
<body onload="displayString()">
    <div id="output"></div>
</body>
</html>