What are the advantages and disadvantages of using a DIV with overflow:auto instead of an i-frame for forms in PHP?

Using a DIV with overflow:auto instead of an i-frame for forms in PHP can provide a more seamless user experience as the content will scroll within the page rather than opening in a separate frame. This can make the form feel more integrated with the rest of the website. However, using overflow:auto may not be suitable for all types of forms, especially those with complex layouts or large amounts of content.

<div style="overflow:auto; height: 300px;">
  <form action="submit_form.php" method="post">
    <!-- form fields go here -->
    <input type="submit" value="Submit">
  </form>
</div>