Link DOM Enlightenment
For the purpose of this book (i.e. grokking the concepts), I'm going to sidestep the browser API mess and dying browser discrepancies in an effort to expose the modern DOM. That's right, I'm going to sidestep the ugliness in an effort to focus on the here and now. After all, we have solutions like jQuery to deal with all that browser ugliness, and you should definitely be leveraging something like jQuery when dealing with deprecated browsers.