browser autocomplete/saved form not work in ajax request

Question

Its really hard to search the any combination of keywords in search engine about this because it used by most popular developer wanted a custom autocomplete by ajax.

Most developer search about the custom autocomplete to get result from db by ajax or about how to disable browser autocomplete due to security reason or they wantted to use another autocomplete extender.

However I am not talking about the autocomplete. I finding about simple normal browser autocomplete or browser saved form either IE or FF that will act like dropdown recent choice during filling a text in a textbox.

It simple and normal filling a form like username and password in a login form. After the form submitted (the form data post) browser will save the autocomplete or event in FF will ask to save along with the password.

Now, think about the login submitted via ajax. The form data not automatically saved by either IE or FF simply because the form not sent by post method. I am pretty sure it is because of ajax vs post method.

CMS like DotNetNuke using this way and its really hard to me to type username and password for 5 user login for development purpose, event I want to let user save their own form data in the browser without any custom or extender. By another example, user can see and use same email to fill an any email form across web site or domain.

How to workaround with this? Did you have suggestion what keywords is more suitable to search?

CallMeLaNN