Pasted

<html>
<head>
    <title>My page</title>
    <script type="text/javascript">
    
        function ChangeElements() {
            var label = document.getElementById("label");
            var btn = document.getElementById("button");
            
            label.innerHTML = "You made some changes";
            btn.setAttribute("value", "You clicked me");
        }
        
    </script>
</head>
 
<body>
    <p id="label">This is a label</p>
    <input onclick="ChangeElements()" type="button" id="button" value="Click me" />
</body>
</html>