Forum Moderators: mack
You can't do this with any "normal" script, you need an ActiveX or Java applet running on the local machine in trusted mode. Don't even think that this works on IE6 unless you manually add the site as "Most trusted". Best way would be a downloadable executable, but then you've got all of the "trust" issue.
Stick up a page with clear instructions on how to do this under different OS.