JMP204 – JavaScript for Lotusscript developers
Great session with Henry Newberry as an introduction to JavaScript (still foreign territory to me) for Lotusscript developers (which I still kind of consider myself to be). The language is pretty straightforward, and in some ways is easier than Lotusscript; i.e., no need to declare variables, but some gotchas, like those variables being case-sensitive.
Need to pick up the JavaScript Bible by Danny Goodman.
Book is pretty good (I have it). But if you want to learn online I recommend w3schools.
http://www.w3schools.com/js/default.asp