Full story: I am working on a project for my company that requires users at each of our locations to upload reports generated by a third party software. All reports generate
You cannot set the value of an input file, that is a security issue.
You can use an activex control, although that stuff is getting pretty out dated. There are many advanced file upload activex controls and I bet you can pick one up pretty cheap.
Registry setting for Download directory might do the trick: (even though its an upload) and you would have to figure out how to set it every time they open IE
HKCU\Software\Microsoft\Internet Explorer\DownloadDirectory