recording another url without visiting there

If a user visits http://aaaa.com, the browser will have the record of it.

So, if the user enters "a" into the address box of his or her browser,
The browser will suggest "http://aaaa.con" on the address box from its history.

I like to make it like the following.

(1) If a user visits http://aaaa.com which is supposed to reach my server,
The browser have the record of not only "http://aaa.com," but also "http://bbbb.com." without visiting http://bbbb.com.

(2) So if he or she enters "b" into the address box, the browser suggests "http://bbbb.com."


Is it possible with any javascipt code in index.html at http://aaaa.com?

as far as I know, that is impossible

No, for security reasons, JavaScript on a webpage cannot hijack the browser behavior in this way. However, in browsers like Firefox, you can write extensions in JavaScript that would allow this behavior.

Actually, on second thought, you probably can send an HTTP POST REQUEST for the address http://bbbb.com to a hidden IFRAME. That should trick the browser into think that the user has visited bbbb.com.