ranma You should think more before posting your comments, because they tend to be inaccurate lately, and not that constructive...
imothep85 Apparently the "www" subdomain is important here for the AJAX call
Try whether to access your page from http://www.mattepainting.be/test/index.html
Or remove the "www" to the text file in your code
Maybe there's a universal solution to make both work at the same time though
EDIT: ah one minute late, you found first ^^