The type of the element node in Dom can be determined by its nodetype attribute!
There may be several, but we often encounter the following three:
Element (nodetype = 1): matches most elements in the XML file. For example, <li>, <A>, and <body> all have a nodetype with a value of 1.
Text (nodetype = 3): match all text blocks in the Document. When previussibling and nextsibling are used to traverse the DOM structure, you will often encounter text blocks inside and between elements.
Document (nodetype = 9): matches the root element of a document. For example, in an HTML document, it is a <HTML> element.
In addition, you can use constants to indicate different Dom node types (but only useful for non-ie browsers ). remember 1, 3, 9. it is not as intuitive to use document. element_node, document. text_node or document. document_node.
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