AJAX: problem with some characters

Hi, I'm trying to recover text with strings using AJAX from a txt and i have problems with some characters:

http://i.imgur.com/IMq4eXv.png

In the first part, i'm using AJAX, and in the second part i write the text directly, here you can see the code:

http://i.imgur.com/BFl9y62.png

As you can see, in the AJAX part the special characters have an error. Someone have this problem before? How can i fix it?

thanks in advance.

Sorry but i didn't find the solution the first time i searched:

You must save the txt as "unicode"