Thanks for your reply.
the website contains 18 different documents, that simply appears to the viewer / user with the same background. what I am looking for is the documents / articles that range from
site/docs/article_details.php?article_id=1
to
site/docs/article_details.php?article_id=18
Why can not I find documents 1 to 18 in directories site/docs/
Where else could they be