Benefits:

AJAX brings to web applications new characteristics that are not available as standard in traditional web applications.

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  Continuous uploading,time is not wasted while waiting for page redraws and reloads
  
  


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  Real-time updates,certain parts of the web pages are directly updated without requiring the whole page to updated.
  
  


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  Greater graphical interaction similar to desktop applications – drag and drop
  
  


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  Standard mechanism for the client to interact with the server and only send small xml fragments.