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There are a number of things you need to consider in setting up processing to send and/or retrieve information from the server without reloading the web page. Some of these things are needed for every such call, some you get a choice between several options, and some are completely optional.

The things you must have in setting up your Ajax processing include:

We get a choice when it comes to how we:

If we wish we can also:

You also need to consider security with respect to what you pass and how you handle it on the server.

Further things you need to know about in order to use Ajax most effectively include:

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