Technology used in Ajax

Ajax as a combination of set of technologies.
Use of Ajax is combination is of four things –
1: HTML/Xhtml, 2: JAVASCRIPT, 3: XML, 4: CSS.
2. JAVASCRIPT(ECMA Script) used for the local processing and DOM (Document Object model) data access inside the page or access elements of XML file read on the server.
3. Asynchronous data retrieval with XMLHttpRequest object.
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