ajax-ssl.js

(function($) {
	$(document).ready(function(e){
		e.preventDefault();
		$('input[name=titleSubmit]').click(function(){
			$.ajax({
				type: "GET",
				url: SSL_Ajax.ajaxurl,
				cache: false,
				dataType: "jsonp",				
				crossDomain: true,
				data: {
					action : 'ajaxSSL',
					ajaxSSLNonce : SSL_Ajax.ajaxSSLNonce,
					input : $('input[name=title]').val()
				},
				
				success: function( data ) {
					console.log( 'success' );
					console.log( data );
				},
				
				complete: function( data ) {
					console.log( 'complete' );
					console.log( data );
				},
				
				error: function( data ) {
					console.log( 'error' );
					console.log( data );
				}
			});
		});
	});
})(jQuery);	  

ajax-ssl.php

<?php
/**
* Plugin Name: Ajax SSL Example
* Plugin URI: http://www.jackreichert.com/
* Description: A simple plugin example that implements jsonp in WordPress.
* Version: 0.1
* Author: Jack Reichert
* Author URI: http://www.jackreichert.com
* License: GPL2
*/

add_action( 'wp_enqueue_scripts', 'ajaxSSL_scripts' );
add_action( 'wp_ajax_ajaxSSL', 'ajaxSSL_func' );
add_action( 'wp_ajax_nopriv_ajaxSSL', 'ajaxSSL_func' );

function ajaxSSL_scripts() {
	wp_enqueue_script( 'ajaxSSL_script', plugins_url( 'ajax-ssl.js', __FILE__ ), array( 'jquery' ));
	wp_localize_script( 'ajaxSSL_script', 'SSL_Ajax', array(
        'ajaxurl'		=> admin_url( 'admin-ajax.php' ),
        'ajaxSSLNonce'	=> wp_create_nonce( 'ajaxSSL-nonce' ))
    );
}

function ajaxSSL_func() {
	
	$nonce = $_GET['ajaxSSLNonce']; 	
	if ( ! wp_verify_nonce( $nonce, 'ajaxSSL-nonce' ) ) {
		die ( 'Busted!');
	}
		
	// generate the response
	$response = json_encode( $_GET );
	
	// response output
	header("content-type: text/javascript; charset=utf-8");
	header("access-control-allow-origin: *");
	echo htmlspecialchars($_GET['callback']) . '(' . $response . ')';
 
	// IMPORTANT: don't forget to "exit"
	exit;
}