I know many other languages use the eval() function to take a string argument and evaluate it as part of the source code (so you can run a function or assign a variable etc). I've seen it in PHP, ...

JSTerm, an experimental Firefox add-on for JavaScript developers, has hit version 2.0. The JSTerm Firefox add-on — not to be confused with the HTML5 Telnet Emulator by the same name — adds a “jsterm” ...