详细介绍了一个基于组件三层结构的电子分类广告系统。

Electronic classified advertisement sys-tem is introduced in detail based on the component and the three-layer structure.

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如今雅虎提供的内容几乎无所不包：电子邮件、即时信息、聊天、俱乐部、相集、主页、文件存贮、购物、拍卖以及分类广告等等。

Yahoo now offers almost everything you want: email, instant messaging, chat, clubs, photo albums, home web pages, file storage, shop, auctions, classified ads and more.

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