AJAX means Asynchronous JavaScript And XML.It is a method to create web applications in more faster way.In this without loading the page Javascript communicates with the webserver.It uses asynchronous data transfer so that webpages can request information in small bits.AJAX is supported by all the servers.As AJAX directly communicates with the server so one need not have to wait get information from database from server like Javascript.
In AJAX when we send request to the server there are two methods used:-
1. open()
2. send()
In open() method there are three arguments or parameters
1. It tells which method we are using to send request.
2. It specifies the URL of the server-side script.
3. It tells that the request to be handled asynchronously.
In send() method we send the request to the server.
AJAX is not a any new programming language, but it is a new way to use existing standards like JavaScript, XML, HTML, CSS. With AJAX we can create faster and user friendly applications.It is basically based on JavaScript and HTTP requests.It is a technology which is not dependent on web server software or on any platform.
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