I've found that site is great for learning javascript. It will walk you through the whole process and even if you've never written a bit of JS before if your life you should be able to get the hang of it quite quickly with this site. It also has a lot of other materials on it.
I looked at that site last night and actually am trying to ge tthe hang of what they are talking about. I guess if I take my time and really study it, ill get it eventually.
Thank you.
How I've basically started with it is with the help of the yahoo widget engine. It is based on Java and it has a good reference book on some of the functions and so on.