Demonstrate use of jQuery $.ajax with an array of jqXHR Deferred Promise objects passed to the $.when function.

fiddle.js

// Seeing this through jsfiddle?
// Get the source from github gist: https://gist.github.com/1873879

// Create an array with two jqXHR objects from two separate $.ajax calls.
var arrJqx = [];

// This call has no delay and the response will come back from the server
// almost immediately.
arrJqx.push($.ajax ({
    url: "/echo/json/",
	dataType: "json",
    data: {json: "{\"text\": \"foo\"}"},
    type: "POST"
}));

// This call has a five second delay before the response is returned by the
// server.
arrJqx.push($.ajax ({
    url: "/echo/json/",
	dataType: "json",
    data: {json: "{\"text\": \"bar\"}", delay: 5},
    type: "POST"
}));

// The server response is not displayed in an alert until both calls return.
// The done function callback will iterate over the arguments passed to the
// function and output the JSON stringified result of the jqXHR object, there
// should be two alerts.
$.when.apply($, arrJqx).done(function(){
    $.each(arguments, function(index, arg) {
		alert (JSON.stringify(arg[2]));
    });
});

Try it in jsfiddle:
http://jsfiddle.net/gh/gist/jquery/1.7.1/1873879/