<!DOCTYPE html>
<body>
<form>
<fieldset id="a">
<input id="b" type="file">
<br />
<input id="c" type="submit">
</fieldset>
</form>
</body>
<!DOCTYPE html>
<body>
<form>
<fieldset id="a">
<input id="b" type="file">
<br />
<input id="c" type="submit">
</fieldset>
</form>
</body>