"Interface Components from Scratch" by Nathan Smith
The following code demos are from jQuery Cookbook.
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13.1 Creating Custom Tooltips
13.2 Navigating a File Tree Expander
13.3 Expanding an Accordion
13.4 Tabbing Through a Document
13.5 Displaying a Simple Modal Window
13.6 Building Drop-Down Menus
13.7 Cross-Fading Rotating Images
13.8 Sliding Panels