URL Address stay same on everypage

[=VIP=]

Hello, Can you help me I am making a website which will be security safe login. so When the webpage with textfield of Username & Password when i login. It take to other pages e.g

www.websitename.com/login.asp = it login page
www.websitename.com/welcome.asp = that where it login submit

So when i login in my mates house. Mate can look the address so they can login in and look my private stuffs.

So have you got any ideas how can i stop that ?

Here is good example, go to www.runescape.com .... click the any pages and look the URL it stays same.... don't matter which page it stay same.

I hope you can help me with that.... Thanks

[felgall]

It is usually done using frames. It doesn't provide the protection you are after though since all someone needs to do is view the source to find out the real URL.

[TJ111]

.asp != .php