In the United States, written works are (theoretically) protected from the time they are written (which doesn't keep theft from happening but it means if you can prove when you wrote something, you can win a lawsuit; you don't need to go through a registration process).  The problem is, there is no world wide copyright or registration, that I know of.  The rules vary for country to country, and Sweden has its own laws governing your creative works:

http://www.sweden.se/templates/cs/Publication____13676.aspx (I'm sure you can find a version in Swedish).

My rule is (and not everyone here agrees) that I don't put on the web anything I plan on getting published, because it is so difficult to protect one's work on the Internet.

What I would do, if I am worried on the issue, is make sure I have some proof of when I started writing something (in essence, dating my pages if I am writing in pen or pencil; making sure I don't write over the rough draft if I am writing on a computer so that the original date of the rough draft shows digitally).

I'm sure someone else knows more than I do on the topic. I hope they share their information. I am always interested to learn more.