Bootstro.js - 实现页面操作向导功能

特性：

支持多种平台和设备

Utilises Bootstrap Popovers

Bootstro popovers can have variable width, even though Bootrap 2.3 popovers does not (yet) (issue #1730 & solution)

Small (3.0K minified JS & 0.5K minified CSS)

No collision. Everything safely namespaced to bootstro. All events unbinded when the intro stops

Any element anywhere on the page can be intro'ed: popovers are automatically scrolled to so they always get focused

Easily customizable: Bootstro provides various public methods so you can control as you like bootstrap.start(), bootstrap.next(), bootstrap.prev()...

Keyboard shortcuts: Works with Esc, → ↓, ← ↑ shortcuts too