Ajax or Web 2.0

Ajax, the new hot web development technique. It uses JavaScript and XML to create interactive web pages. Web application are run on the client computer instead of on the web server. The idea is to decrease data traffic between the client and the web server. Web developers should check out how to use Ajax.I think that Ajax could cause more security problems on the internet. More and more web application will be running on the host or client computer instead of on the server. I do not trust the writers of all those web applications that now will be running on my computer!