The Book of JavaScript, 2nd Edition

XMLHttpRequest [FF] and ActiveXObject("Microsoft.XMLHTTP") [IE 5.5]

These objects are used extensively in Ajax, as described in Chapter 14, Chapter 15, Chapter 16, and Chapter 17.

Properties

readyState	State of the request
responseText	String containing the response to the request
responseXML	If the response is an XML document, it is stored here
status	Response status from the server

Methods

abort()	Cancels the request
open()	Tells the request object where the request should go and what kind of request it is. See Chapter 14 for more information.
send()	Sends the request. If this is a POST-type request, the information to send to the server is sent as a parameter. Otherwise, the parameter is null.

Handlers

onReadyStateChange

Triggered when the request object's