Question: Bit of a strange question here i know.

but i wanted to know if some kind of standalone engine for javascript exists..

basically i want to test running of my javascript without having to load a web page...

Maybe it doesn't exist? Like some kind of ide where i can run commands directly without launching IE etc...

I have a great editor but it doesn't support that.. i still need to launch ie / firefxo

What i was thinking of some kind of standalone javascript engine existed that i could write my code here and make debugging a bit easier... and then copy to my webpage.

I know firebug exists but you can't specifically do what i am asking cna you?

Any ideas?

Answer: 
Check out [Rhino](http://mozilla.github.io/rhino/) or [Spidermonkey](https://spidermonkey.dev/). You might want to grab an implementation of the [ServerJS standard](https://wiki.mozilla.org/ServerJS), like [Narwhal](http://narwhaljs.org/) while you're at it.
You can also try out Google Chrome's JavaScript engine, V8:  

<http://code.google.com/p/v8/>