Band对象有三类：Desk，Info和Comm以及Tools Bands。其中Desk Bands 用于任务栏；Info和Comm--又称浏览栏（Explorer Bar）--用于IE和资源管理器。-Band object has three categories: Desk, Info and Comm and Tools Bands. Desk Bands for which the task bar　Info and Comm- also known as the navigation bar (Explorer Bar)- for IE and Explorer.