Edit .txt files

Hi! I am currently making a flash site for sharing and editing text and information.
(A business thing)

In this webpage i am importing text from .txt files into dynamic text fields using LoadVars.
I would like to make a link from flash to the .txt files so that users could edit the .txt files online. So that when someone edits them, the edited text will update in the flash site.

I have been googeling all over internet trying to find out how i can edit .txt files online, without having to download the .txt files, edit them on my computer and upload them to the website server using ftp. Is this possible? To edit txt files online in the web browser?

I really need a hand on this oneā€¦