Untitled

<!DOCTYPE html>
    <html>
    <body>

    <p>Click the button to make a BUTTON element with text.</p>

    <button onclick="createbtn()">Create</button>

    <script>
    function createbtn() {
        var btn = document.createElement("BUTTON");
        var t = document.createTextNode("CLICK ME");
        btn.appendChild(t);
        document.body.appendChild(btn);
    }
    </script>

    </body>
    </html>