Ajax is assembly of correlated web development tools and which is used on the client side application to build asynchronous application. The application which is developed using Ajax tools that can be send and retrieve data to and from the server without disturbing the any other part of same page of that web application.
Ajax is a collection of multiple technologies. In which we should do the mark up and style the information using HTML and CSS tools. We can develop a web application in which information exchange asynchronously between server and browser using the concept of JavaScript and XmlHttpRequest object.
Figure: Comparison between classic and Ajax based web application model. It can reject the start and stop environment of communication on web application by hosting the concept of Ajax engine between the user and web server. The whole process looks similar to putting new layer in application and that takes longer time to react. This process loads only particular section of web page instead of whole page. When session is started the web browser loads
Ajax engine which is built by using JavaScript and frequently put left in unseen frame. When we work on client side programming at that time we cannot access the function of server side. But this is possible when we uses Ajax technology. In this technology we can access server side function by using page method which is built in JavaScript.
Most of the Google products are developed using Ajax Technique and they are Orkut, Google map, Google suggest and Google groups.
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