Automatically open a local file from webpage with given id

[mina]

I would like to design a web service ( or a script embedded into a web page running on a local host) which accepts fileid as a parameter and then automatically open corresponding file in the same host.for example if we enter http://localhost/openFile.aspx?id=JohnBrown to browser on a windows PC, it should automatically open file JohnBrown.ppsx stored in the hard drive.Could you guide me how to achieve this?Thanks