Ajax stands for Asynchronous JavaScript and XML, as
the name suggests Ajax makes use of JavaScript to perform asynchronous calls to
the server to send/receive data. Ajax
helps in updating information in a page without refreshing the entre page, this
helps in reducing the response time.
Ajax is all around you, for example Gmail uses Ajax, if you select a few items and delete them, and you could notice that the selected items get deleted but the page does not get refreshed, this is a live example of Ajax.
Example
A typical Ajax example is a country and city dropdown, on selecting a country
in the country dropdown an Asynchronous Ajax request is sent to the server to
fetch the cities corresponding to the selected country, the server sends back
the list of cities in either Test, XML, HTML or JSon format, Ajax receives the
data parses it and loads it into the cities dropdown.
Ajax is all around you, for example Gmail uses Ajax, if you select a few items and delete them, and you could notice that the selected items get deleted but the page does not get refreshed, this is a live example of Ajax.
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