Christian Heilmann's excellent guide to writing unobtrusive JavaScript. Takes the reader from the inline JavaScript world right through to a clean dynamically attached events with all the JavaScript code in external files. Covers DOM Scripting. This is the key reference to unobtrusive scripting.
Dustin Diaz makes the case for using YUI Event Utility over the currently popular addEvent. The benefits Dustin points out include automatic scope correction, automatic browser abstraction.
Speeding up object detection by doing the detection once. Dean Edwards demonstrates a quick improvement using the ubiquitous addEvent function.
Dean Edwards presents his improvement to Scott Andrews' famous addEvent() functions. Solving the cross-browser this reference differences, and passing event objects correctly.
Dustin Diaz names his top ten list, which includes Scott Andrew's addEvent(), Dean Edwards' cssQuery(). The cookie manipulation functions take the first three places, and the Prototype $() gets an honourable mention. Dustin also includes a JavaScript file containing all 10 favourite methods.