JavaScript

JavaScript can give us the ultimate control over our pages, allowing us to change their layout and content dynamically and in real-time. JavaScript is also the client-side component of AJAX, which is a crucial technology in all the modern Web applications.

However, we must bear in mind that JavaScript can be banned from our client's Web browsers due to strict security policies, for example. JavaScript is also not fully supported on many of the low-end smart phones and PDAs. We should check the target environment for our APEX application and then decide how to use JavaScript.

Mastering JavaScript will make your life as a Web application developer much easier, regardless of which specific development tool you choose to use. Spending time learning it will definitely be worth your while, and the Internet is filled with JavaScript tutorials that can greatly assist in the learning process.

APEX includes a built-in JavaScript library. As of version 3.x, this library is documented in the...