MooTools ContextMenu Class by David Walsh
Do you need to write some custom code or plug-in together for a context menu? I’m talking about the menu that comes up when you use your right mouse click. Well, now you don’t because David Walsh has release a pretty wicked and flexible ContextMenu class for MooTools.
CSS Best Practice #4: Understand Selector Specificity for Better Speed and Easier Override
Understanding the specificity of CSS selectors is important because it makes overriding your previous styles easier. The fastest to slowest selectors also corresponds to how easy it will be to override the cascaded and/or inherited style rules.