Another important and often not talked about topic is event registration. Chapter 6 of this book goes into the various ways and element can respond to an event. From event phases, (capturing and bubbling), traditional event binding (DOM Level 1) to W3C DOM Binding. This can be a very difficult topic to understand since there are a few differences between the way IE and other browsers handle it. But John explains each difference in great detail and makes you fully aware of how to handle it with some nice examples.