As we’ve seen in other articles in this series, XHTML offers a lot of advantages over HTML. It’s stricter, cleaner, more robust, and extensible. However, some modern browsers such as Internet Explorer don’t understand XHTML; they only understand HTML 4. Fortunately, the two languages are very similar and, by bearing a few guidelines in mind, you can write valid XHTML documents that can be processed correctly by HTML 4 browsers.
As well as fields such as text fields, checkboxes and
select menus, an HTML form can contain different types of buttons. Form buttons allow the user to submit the filled-in form to the server for processing. Your form will generally contain at least one form submit button so that the form can be sent.