<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Function as Event Handler</title>
    <script>
        // Define a function to handle the click event
        function showMessage() {
            alert("Button was clicked!");
        }
    </script>
</head>
<body>
    <!-- Button element with an onclick event handler -->
    <button onclick="showMessage()">Click Me!</button>
</body>
</html>