Just as you can store data in XML and access it without a browser refresh using AJAX you can also do the same with a format called JSON. JSON is simply short for JavaScript Object Notation, ie JSON is JavaScript. This means objects (information) is stored in a native JavaScript format.
This article will address pros [...]

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An Example
The fundamental philosophy of AJAX is to load the static parts of your webpage only once, and request a small amount of information about the bits that change from a server. This makes changing the displayed data much faster.
I have access toPHP on this webserver but I will not dwell on the server [...]

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