Javascript-node type

The node type can be determined by checking the node's nodetype. The following three values are often encountered:

1. element (nodetype = 1)

Matches most elements in the XML file. For example, <li>, <A>, <p>

2. Text (nodetype = 3)

Match all text blocks in the document.

3. Documentation (nodetype = 9)

Matches the root element of an element.

For the node type of the element, you can also judge it by document. element_node, document. text_node, and document. document_node (which cannot be implemented in IE8, but can be tested using Firefox ).

You can use the following methods to traverse elements:

1. previussibling

Obtain the previous Node

2. nextsibling

Obtain the next node

3. firstchild

Obtain the first subnode

4. lastchild

Get the last subnode

5. parentnode

Get parent node

Details: