JavaScript Remote Scripting

JavaScript Remote Scripting, or JSRS, is a web development technique for creating interactive web applications using a combination of:

HTML (or XHTML)
The Document Object Model manipulated through JavaScript to dynamically display and interact with the information presented
A transport layer. Different technologies may be used, though using a script tag or an iframe is used the most because it has better browser support than XmlHttpRequest.
A data format. XML with WDDX can be used as well as JSON or any other text format.

A similar approach is AJAX, though it depends on the XmlHttpRequest in newer web browsers.

Libraries

BlueShoes JSRS
Brent Ashley
Micorsoft's solution: MSRS
Echo is a Java framework for developing object-oriented, event-driven Web applications.