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I want to reach a function like twitter. When people add a comment in my site anywhere. The newest information will display in one part of my home page. And upload the information without refresh the home page. I think it could be done by ajax, but I am a newbie, can anyone give me a live demo? or introduce me some plugin?
This is a good start for jquery: http://jqueryfordesigners.com/simple-jquery-spy-effect/
Then your ajax call will simply need to get the latest comments from your database. Probably by timestamp or datetime