how can I have javascript read and write to a file?

Question

what I want to do is make a javascript game that can be played on two diffent computers. I know can do this so the game spits out a string that the two playing it have to tell eachother using some other means. but I was wondering if there was some way I could automate the process of transfering that between the two programs. I do have full access to a server running IIS

is there a way I could have java script talk to like a cgi script or something telling it what to write to the server so that the other instance of the page can load the new settings from the server?
and if so how?

Answer 1

You may have any rights and access for the server but the Java Script may not write to file -- JavaScript cannot write to any disk - neither winchester, nor floppy. This is a security restriction built in the language and the interpreters (browsers).
Sorry.