Try it Editor: html5_fieldset

Edit This Code :



<!DOCTYPE html>
<html>
<body>

<form action="http://dwf-try.blogspot.com/2018/09/submitted-form-data.html" method="get">
<fieldset name="personalia">
  Name: <input type="text" name="username"><br>
  Email: <input type="text" name="usermail"><br>
</fieldset>
<button type="button" onclick="form.personalia.style.backgroundColor='yellow'">Change background color of fieldset</button>
<input type="submit">
</form>

<p><b>Note:</b> The name attribute of the fieldset element is not supported in IE.</p>

</body>
</html>

Result :

html5_fieldset_name