带有预选定复选框的 HTML 表单 - 在线编辑器

          <form action="demo_form.php" method="get">
  <input type="checkbox" name="vehicle" value="Bike"> I have a bike<br>
  <input type="checkbox" name="vehicle" value="Car" checked> I have a car<br>
  <input type="submit" value="提交">
        