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Introduction
A lot of talking about AJAX is taking place here and there; AJAX is the acronym of "Asynchronous JavaScript and XML" (actually, the original creator didn't intend on it being an acyonym for anything, it just got adopted), a technology based on XMLHttpRequest, which is now supported by all main browsers. The basic idea is quite simple - and not actually a breakthrough - but it allows updating a page following a server request, without reloading the entire set of data. Some examples can be found on GMail or Google Suggest. For additional information about AJAX, you can see Wikipedia.

In this post I plan on demonstrating how to setup your webpages to call web services in both a cross domain and local service architecture. We'll start by introducing just how this works.

Permitting that we want to call server-side web methods on a web service:

1. Server side we need to setup a web service that exposes web methods that can be called.
2. On any client side application all we need to do is expose the WSDL to automatically generate a javascript proxy class to allow us to use the Web service return types - similar to what visual studio does when you add a web reference.

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