[javascript-dev] Simple JavaScript Question

Hi all. 

I have used JavaScript quite a lot in my web development but i cant find any explanations on the net as to the basics of JavaScript within Max MSP.

All i want to know is how to set up the inlets and outlets etc once i get this I can apply my JS knowledge to it fine.

If anyone could point me in the direction of a tutorial or give me a simple example of how to e.g set a number coming into the js object to a variable, perform a simple math function on that variable and then send it out the outlet i would much appreciate it.

Cheers!!

Adam