Olav Junker Kjær takes us through how browser-based JavaScript deals with events and default action, including the dispatch sequence of events, when they are bubbled and captured and the order of these events. Also shows some setTimeout() tricks to deal with long-running JavaScript
Christian Heilmann lays out seven rules to better unobtrusive JavaScript, including not making assumptions about JavaScript, the browser and the document. Work with structured markup. If you are traversing a document, maybe there's a solution that can take advantage of CSS's selector mechanism instead. Work with browsers and users. Better understanding of events, and playing nice with namespace, scope, and patterns. And of course, think about the next developer, so keep the code maintainable.
An index of JavaScript's core methods, ordered by method name. No DOM methods are listed, but Browser Object Model (BOM) is.