What is AJAX... the big picture
Probably the wrong place to post this, and if so I apologize. I'm just trying to get a handle on what AJAX is, what it could do for me, and based on my current skills the bast way to learn about it. On that last point, I've maintained some huge and yet very primitive websites. But it started way back at a time when scripting was a nightmare. I think i got in right around the time Netscape 4 and IE 4 were the predominate browsers, and each version was taking their DOMs in significantly different directions. Building a library was almost futile, because each new browser version would break your interface to the DOM. For example, below was a test example I wrote for a long gone employer to demonstrate how a human-machine interface (HMI) for an electric substation could be done using a browser rather than a custom graphics application.
But maybe I have a totally wrong idea what AJAX is about, and maybe its completely the wrong tool for writing such HMIs? I am been more of an electronics and embedded systems engineer for the past decade, and I've obviously completely lost touch with web technology. So all pointers and advise is much appreciated.