The term AJAX referred as "Asynchronous JavaScript And XML," but is now used much more generally to cover all methods of communicating with a server using JavaScript.

Using the Ajax techniques we can submit server requests and get the information from the server to the user without the necessity of waiting for a page load. The page update without refresh was done by Javascript, PHP and XML's XMLHTTPRequest object.

Ajax is actually a grouping of several technologies working together to offer this capability. This could include the techniques bellow,

• Ajax offer standards-based presentation using XHTML and CSS.

• Client, server interaction made using DOM( Document Object Model) and provide dynamic display.

• Data interchange and manipulation was performed by XML and XSLT.

• Asynchronous data recovery using XMLHttpRequest.

• And make JavaScript binding with everything together.

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