Currently, Sun will plan to add Asynchronous JavaScript and XML (Ajax) to J2EE to achieve better dynamic web applications. However, there are many unfavorable conditions, including complexity, standard issues (XMLHTTPREQUEST can not be part of JavaScript), and many problems in different browsers, compile, and open source, etc. are waiting Treatment.
More information:
Http://bpcatalog.dev.java.net/nonav/ajax/index.html
