ScrollStory 是个 jQuery UI 部件，用来创建简单的，基于滚动的页面和交互方式。用户滚动到哪个部分就高亮页面的哪个部分。在线演示
主要特性：
100% style agnostic. Just a collection of often-used scroll-based patterns.
16+ jQueryUI-style events/callbacks for various application state events.
Focus and blur event when an individual story becomes active or inactive.
Programmatically animated scroll to any item.
Items can be grouped into categories, with event dispatched as categories change.
Items filterable by user-specified tags.
Items aware of their in-viewport status.
Throttled scroll events and minimal DOM usage.
