How do you enable javascript on your computer?

Microsoft Internet Explorer: From the Tools menu, choose Internet Options. Then click the Security tab. For IE 4.x, click Custom and Settings. For IE 5.x, click Custom Level. Scroll to the Active...

if its file sharing a local network over your lan, or if its a game, social networking site on the internet its the internet.

The internet does.

A network card connnects to a router (wireless or LAN) the the router connects to other computers or a modem (intranet-telephone interface)

You don't. JavaScript is a special type of language which you will typically find embedded in the program which use them. For example, each web browser on your computer will have its own version of...