Get Parameter from HTTP Request and save into a text file.

Get Parameter from HTTP Request and save into a text file. Require a ASP/Javascript page that will read a parameter from the calling URL and then save the parameter into a file on the C drive of the client. In this example the parameter is called 'key24' Would need to save it as a file eg c:\test\[login to view URL] Folder would need to be created if it doesn't exist. Would then need to delete it again. Would be run in Internet Explorer always.