My web is consist of some page. Then the control page is not index page.
The system is, only registered members are able to go to control page after login with username and password. How the arduino can render the code on the control page?
Enough tap dancing. Your Arduino is either a client or a server. There are some things it can do as a client that it can't do as a server. There are some things it can do as a server that it can't do as a client. Post your Arduino code so we can tell which it is, since you won't directly answer the question.
I get the impression, though, that you think that a client on one machine can "see" what a browser on another machine has rendered. That is NOT possible. For any client or any browser.