DOM-Nodes
One,
DOM Node associated with some things as follows:
parentNode、childNodes[nodenumber]、firstChild、lastChild、previousSibling、nextSibling；
In addition there are many such appendChild (), removeChild (), firstChild, nextSibling, previousSibling, parentNode
But also with the methods and properties related to the operation Node
div1
p1
p2
p3
Div2
p21
p22
p23
div3
p31
p32
p33
Follows
Depending childNodes index, the position may be known as
Two, nodeValue property
nodeValue property can take text nodes, attribute nodes, but to get any element nodes.
Note that node childNodes [0], childNodes [1] belongs text nodes, attributes of an application so as nodeValue
Three, nodeName property
1, nodeName attribute is read-only.
2, an element node nodeName is the tag name
3, an attribute node's nodeName is the attribute name
4, a text node's nodeName always expressed as #text
5, a document of nodeName always expressed as #document
Four, nodeType property
If it is, then the nodeType element will be represented as 1, attribute the nodeType compared with 2,
The text was nodeType 3, comment of nodeType was 8, document, compared with the 9 nodeType.
Fifth, the difference document.body and document.documentElement
