New programming techniques allow of individual data exchange with the server:

• GoogleMail reports without reload when new messages have arrived.
• Writely, the online word processing programme, opens contact menus after right click.
• Google Maps zooms maps without resending the entire request to the server.
• The web is more and more turning into an application, offering look & feel of programmes locally installed on the PC.
• The secret is the new technology called Ajax.
• Ajax stands for “Asynchronous JavaScript and XML”.
• The combination of these two techniques allows the exchange of only specifically requested data between browser and server.
• Ajax provides for new contents on the website without having to completely reload it.
• The traditional web organisation in sites is taken over by new web applications as fast as desktop software.
• In addition, Ajax enables the mixing up of different web offers since data can derive from diverse sources.

The AJAX principle (According to O’Reilly: Web 2.0 for Participation).

(According to O’Reilly: Web 2.0 for Participation)

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Once more somebody has realized the potential of the web 2.0-elements in terms of information conveyance on a web site. This time, however, the object it has dawned on is the American Space Agency NASA.

In occasion of its 50th anniversary due next year the relaunch is endowed with the version number 5.0 and consists of the first few of a vast number of web 2.0-features planned to be built in by NASA.

Critical Mass is responsible for its realization, the new user-interface being completely based on the javascript-frameworks Prototype and Script.aculo.us.

Some of the new features:

• Transitions: numerous animations in menus and trees
• Accordion: news-entries with roll-over-effect
• Subject-based navigation
• Calendar komponent
• Tag cloud
• Bookmarking: MyNASA as well as support for Digg, Del.icio.us and others
• Opportunity to comment and polls
• Photo gallery

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