Tutorial on XMLHttpRequest objects and Dom objects

Property	Description
onreadystatechange	event triggers for state changes
readyState	Object State (integer): 0 = not initialized 1 = in Read 2 = has been read 3 = in Interaction 4 = Complete
ResponseText	The server process returns a text version of the data
Responsexml	compatibility of server process return data DOM of the XML Document Objects
Status	status code returned by the server , such as: 404 = " File not found " , = " Success "
StatusText	status text information returned by the server

ways to XMLHttpRequest objects:

Method	Description
abort ()	Stop Current request
getallresponseheaders ()	returned as a string to the complete Headers
getResponseHeader ("Headerlabel")	returns a single string of Header label
Open ("Method", "URL" [, asyncflag[, "UserName" [, "Password"]])	set the target of a pending request URL , methods, and other parameters
Send (content)	Send Request
setRequestHeader ("label", "value")	Set up Header and send it along with the request

Second, DOM objects
The Document Object model is a platform-and language-independent interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document. The document can be processed further, and the resulting processing can be put back in the provided page. If the server returns XML, use responsexml to create the DOM directly to manipulate the file.

DOM properties of the object:

Property	Description
childnodes	returns the collection of all child elements of the current element
FirstChild	returns the first child element of the current element
LastChild	returns the last child element of the current element
nextSibling	returns the element immediately following the current element (peer)
previoussibling	returns the element immediately preceding the current element (peer)
nodevalue	Specify a read / Write Property that represents the value of an element
parentnode	Returns the parent node of an element

DOM method of the object:

Method	Description
getElementById (ID) (document)	gets a specified unique ID elements in a property value document
getElementsByTagName (name)	returns a collection of child elements in the current element that have the specified tag name
HasChildNodes ()	returns a Boolean value indicating whether the element has child elements
getattribute (name)	returns the attribute value of an element, which is attributed to the name Specify

used to dynamically create content W 3C DOM Properties and Methods

Property / Method	Description
document.createelement (tagName)	on the Document object createelement method can be created by the TagName the specified element. If the string div is used as a method parameter, a div element is generated
document.createTextNode (text)	of the Document object createTextNode method creates a node that contains static text
element. appendchild (Childnode)	appendchild method to specify the node Childnode add to the list of child nodes of the current element
element. Getattribut (name) element. Setattribut (name, value)	gets and sets the element in the name the value of the property
element. InsertBefore (NewNode, TargetNode)	This method adds the node NewNode inserted as a child node of the current element into the TargetNode element Front
element. RemoveAttribute (name)	This method removes the attribute from the element name
element. RemoveChild (Childnode)	To remove a child element from an element Childnode
element. replacechild (NewNode , OldNode)	the node OldNode Replace with a node NewNode
element. HasChildNodes ()	returns a Boolean value , indicates whether an element has child elements