# Event Object
# # Event Category
* MouseEvent
* KeyboardEvent
* FocusEvent
# # Property
* ClientX
* ClientY
* KeyCode
* Target specific Trigger event element
The AppendChild () method adds the last child node to the node.
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### method
* stoppropagation () block bubbling
* preventdefault () block default action
Bubbling and capturing of # # # Events
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# node
Span style= "COLOR: #b22222" >### node classification
* document 9
* element 1
* attr 2
* text 3
* comment 8
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### property
* NodeName
* nodevalue
* nodetype
# get elements from HTML
### through ID
* getelementbyid ()
* an element with an id attribute that automatically generates a global variable with the same name
# # # By Name property
* Getelementsbyname ()
* ie9+ all elements have the name attribute
* ie9-individual elements have the name attribute
# # # Signed by Mark
* getElementsByTagName ()
* Docuemnt.images
* Document.links
* Document.anchors
* Document.forms
# # # by class type
* Getelementsbyclassname ()
* ie9+
# # # via Selector
* Document.queryselector ()
* Document.queryselectorall ()
# # Document.all
* all elements in the document
# The structure of the document node
### node relationship
* parent Parent Element
* child nodes child elements
* Brothers node sibling element
* Ancestor node ancestor element
* descendant nodes descendant elements
Span style= "COLOR: #b22222" >### node related properties
* parentnode
* childnodes
* firstchild
* lastchild
* nextsibling next sibling element
* previoussibling previous sibling element
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### element-related elements
* parentelement
* children
* firstelementchild ie9+
*&NBSP;LASTELEMENTCHILD&NBSP;&NBSP;&NBSP;IE9 +
* nextelementsibling ie9+
* previouselementsibling ie9+
* childelementcount number of child elements ie9+
* ownerdocument ie9+
09.04 javaScript Event object time bubble and capture node gets elements from HTML by ID name Tag name class selector