Whenever you have to touch the physical drive of your\remote server, know you have to use server side code. A form can request a file, and the file could very well be uploaded to the webpage, but javascript can't push the information (which resides in the Header) anywhere.
javascript runs on the client side unless specifically mentioned in code, <run-at server>, and even then there are far better languages to use server side, like perl,php,asp etc.