$.ajax()

Performs an async AJAX request

$.ajaxPrefilter()

Handle custom Ajax options or modify existing options before each request is sent and before they are processed by $.ajax()

$.ajaxSetup()

Sets the default values for future AJAX requests

$.ajaxTransport()

Creates an object that handles the actual transmission of Ajax data

$.get()

Loads data from a server using an AJAX HTTP GET request

$.getJSON()

Loads JSON-encoded data from a server using a HTTP GET request

$.parseJSON()

Deprecated in version 3.0, use JSON.parse() instead. Takes a well-formed JSON string and returns the resulting JavaScript value

$.getScript()

Loads (and executes) a JavaScript from a server using an AJAX HTTP GET request

$.param()

Creates a serialized representation of an array or object (can be used as URL query string for AJAX requests)

$.post()

Loads data from a server using an AJAX HTTP POST request

ajaxComplete()

Specifies a function to run when the AJAX request completes

ajaxError()

Specifies a function to run when the AJAX request completes with an error

ajaxSend()

Specifies a function to run before the AJAX request is sent

ajaxStart()

Specifies a function to run when the first AJAX request begins

ajaxStop()

Specifies a function to run when all AJAX requests have completed

ajaxSuccess()

Specifies a function to run when an AJAX request completes successfully

load()

Loads data from a server and puts the returned data into the selected element

serialize()

Encodes a set of form elements as a string for submission

serializeArray()

Encodes a set of form elements as an array of names and values