Something very basic that I have to understand in AJAX

Alright, so I started learning AJAX, it's pretty hard for me to understand it but I hope I'll be doing good in the near future. Anyways, My question is, if开发者_高级运维 I do need a server to implement an AJAX code? Like, if I want to load an XML file I must have a server too, to load the data from it? My question might be not understandable, that's because I really haven't understood the basic of it. Thanks :)

Sure you need a server implement an ajax code. You need server even for normal html files (if you're not using localhost and file:// protocol)