Please help to protect my site adress...

I am beginner in programming. I want that my site adress will be protected (encoded). If my real site adress is www.newsite.com/new site/index.html and encoded will be something like this www.newsite.com/%20sadf783asd and if I want to copy this encoded adress and go again to site it will not work. Is any script that can make this?

uhh the pages would have to be made with PHP using fread and fwrite I guess.
do you know any PHP?

Why would you want to do that?!

You could probably use .htaccess too?

I know a little bit about php. Would you like to tell me how to do it?

Thank you

Well, I have a flash website. And I made a login inside a flash file. Doing with actionscript. And when people write password in a textfield and push ok button, then they are going to another site. But that login site must be safe. I think I can do it another way. Just type a code, that the login window opens without location, statusbar, toolbar,...

resizable=no;
location=no;
menubar=no;
status=no;
toolbar=no;

I don't know where to tipe this script, because in actionscript this not works.

It might be not javascript, but if you know how to do it, please help.