1. DOM 中的几点类型

[img]http://dl.iteye.com/upload/picture/pic/50151/942cbab7-47e3-3a78-8d67-735680d64ea6.png[/img]

2. 各种节点类型对应的 12 个常量

[img]http://dl.iteye.com/upload/picture/pic/50153/0f972783-7746-3ea2-b7bc-7c05c372f272.png[/img]

3. 所有节点都包含的特性和方法

[img]http://dl.iteye.com/upload/picture/pic/50155/d44b5144-3775-32e6-97c2-f8bb4f2d35ce.png[/img]

4. 遍历 DOM

[img]http://dl.iteye.com/upload/picture/pic/50161/f990006b-819f-3e7e-9dfe-6a6e9c0be3eb.png[/img]

5. 可用 NodeIterator 和 TreeWalker 对 DOM 进行遍历。