Working with the AJAX Toolkit

Most JavaScript that you add to Visualforce pages, buttons, or links has three sections: first, connecting to the AJAX Toolkit, next, embedding the API methods in JavaScript, and finally, processing the results. This section explains each of these steps.

Connecting to the API

The first portion of any JavaScript code that uses the AJAX Toolkit must make the toolkit available to the JavaScript code. The syntax for this is different depending on whether you are embedding JavaScript in a Visualforce page, or a button or link.
Embedding API Calls in JavaScript
Processing Results