simple answer ;) ... you cannot ... imagine a website that starts programs on your computer ...
anyway :: in case you have a strict environment with one specific browser (for example an intranet, or a local webapplication) ... there might be ways to get privileges (security-related) and with some advanced javascript-methods you might get access to more things with IEs-ActiveX-Controls or mozillas xpcom ... but that is not appropriate for standard-webapps
Comment