HTML is very easy to pick up from http://www.w3schools.com/ which also has tutorials for CSS. The best way I found of learning the more complex bits was to download templates and rip full websites, go into the source code, and change the whole thing line by line, to see what it did.

I've never bothered with learning ActionScript, so I wouldn't know where to start, but the syntax looks similar to Java.

JavaScript will also be on W3Schools, I'd imagine.

As for Java, try the Sun site: http://java.sun.com/docs/books/tutorial/java/index.html.

I'm afraid I don't currently have the free time to teach you everything, but if you come across anything you don't understand, or can't do, in the Sun tutorials, let me know, and I'll walk you through it.

At some point over the next few weeks, I'm going to scan all of my notes from my first year and make PDFs of them, so I don't have to cart heavy folders to University and back. When I've done that, I'll put the links up so others can download them too.