Has anyone used JavaScript on a PeopleSoft page to browse and access a local file?

We have a need to create a page where a user can load an invoice into a table.  The design is not to attach a file and run an app engine process to load the file; but to allow the end user to browse and select an invoice file and load it and then fill in the missing data and send it across to accounts payable to process a voucher.

I was thinking we can do this using Java Script and was wondering if anyone has done this.