application component

This component finds the first file on the drive and reports its name.

I want to use a programing language that is loaded on my computer to run this component. How can I tell if there are any programing languages loaded on my computer?

Can I use JavaScript to run this component? I'm pretty sure JavaScript is running on my computer. To run the component using JavaScript, I would create an html file, save it somewhere on my hard drive, then open it with my browser.

I kind of suspect this isn't possible with JavaScript, though. If so, it would presumeably require me to change some settings in the browser or elsewhere, to allow JavaScript access to my hard drive. That would make my system vulnerable to prying eyes, at best.

I suspect I'm going to need to install one of the free programming languages - Java, Ruby, PSP.

I want to emphasize that I am interested in any alternative ways to do these things.

As for installing the above programming languages, I'm really reluctant to do it without knowing certain things about them. I might go ahead and do it, though.