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<html><body><h3>A demonstration of how to access a FIELDSET element</h3><fieldset id="myFieldset" name="personalia"> Name: <input type="text" name="username"><br> Email: <input type="text" name="usermail"><br></fieldset><p>Click the button to disable the fieldset.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { var x = document.getElementById("myFieldset"); x.disabled = true;}</script></body></html>