The example is fairly generic so you can adapt it to your specific needs. Because AJAX is so useful, we’ll try out jQuery’s AJAX module.

Run the JavaScript file upload example The files used in this example, along with a folder named upload, must be added to the htdocs folder of AHS. When a client accesses the uploader.html file ...

I would say have a good look at some of the JQuery tutorials. There's nothing wrong with doing the JS yourself; JQuery just makes it easier ...