adding login/logout

I found a great host for free but they only let me use html so i was just wondering if you can add a login/logout on a website using html. If so i could someone tell me the code? thanks a lot.

I don't think it can be done in pure HTML.

You can do it in javascript, allthough this is not very secure at all, or you could use .htaccess/.htpasswd. Otherwise you'd need to use a language like perl, php etc.

ok, i know this is a dumb question but a lot of people have told me about html not being secure. What do they mean by that?

It's actually the javascript that you would use for logon that would not be secure. Javascript is a clientside scripting language, meaning the server does nothing more with it than send it to the end-users computer to let them do all the processing. The problem with this is passwords can be "cracked" simply by looking within the pages source code, which i guess alot of people know and thats why they ask how to hide thier source code. (which is 100% impossible) Even if you place the passwords in other files it is still easy to get it one way or another.
With server-side logons, a forms data is POSTed to a server page that no one will ever see.