Abstract: Ajax solves the defects on refreshing the whole page when users submit request in the traditional Web application by asynchronously communicating between the browser and the server, achieves to submit the page without refreshing, enhances interactivities in Web applications, and improves user experience. This paper introduces the framework of Ajax, gives an example of Ajax in a typical Web application development, analyzes the lack of Ajax technology, and gives a view for the development of Ajax in the future.

Key words: Web, Ajax, XMLHTTP request, asynchronous communication