<form action="/" method="post"><fieldset data-role="控制组"><input type="checkbox" name="checkbox-1a" id="checkbox-1a" 选中=""><label for="checkbox-1a">Cheetos</label><input type="checkbox" name="checkbox-2a" id="checkbox-2a"><label for="checkbox-2a">Doritos</label><input type="checkbox" name="checkbox-3a" id="checkbox-3a"><label for="checkbox-3a">Fritos</label><input type="checkbox" name="checkbox-4a" id="checkbox-4a"><label for="checkbox-4a">Sun Chips</label></fieldset></表单>