AIDA/Web is a Smalltalk web server and framework for complex web applications with integrated Ajax support, rich collection of web components to build web pages programatically, MVC-like separation of presentation from domain, nice looking and bookmarkable url links, with integrated session and security management and many more.
AJAX is supported by Aida in a way, as closer to Smalltalk programming as possible. You don’t need to deal with any javascript code to ajaxify your web applications. Ajax functions are supported with help of Prototype and Scriptaculous libraries. For more read Ajax support in AIDA/Web
To download and install AIDA/Web, go to its webpage.
There is a web-site with a collection of simple examples at: demo.aidaweb.si/.