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Oracle Application Express (APEX) and JavaScript

Oracle Tips by Burleson Consulting

HTML-DB and JavaScript

JavaScript is a scripting language created by Netscape that can be embedded into the HTML of a web page to add functionality.  As you have been learning throughout the book, HTML is the language used that tells the browser what to render, where to put it on the screen, etc.  However, if you want to add some functionality such as responding to the selection of a select list you need to use JavaScript.  For the most part this is handled by Oracle Application Express (APEX, formerly HTMLDB) in the built-in templates, cascading style sheets, and the JavaScript provided, but eventually you will want to add your own.

The goal of this chapter is not to teach you JavaScript.  What we do here is show you the what, where, why, how of adding JavaScript to your APEX application.  An excellent on-line tutorial for JavaScript can be found at

As we mentioned JavaScript can be embedded into HTML.  However, you need to know where to add it within the APEX development environment in order to benefit from its use.  It is easier to define the use of JavaScript in APEX if you break it down into two main areas:

  • the JavaScript source code.

  • the call to a JavaScript function. 



APEX developer support:

For APEX development support just call to get an Oracle Certified professional for all APEX development projects.


For more information on this topic, see the book "Easy Oracle HTML-DB Application Express ", the best book anywhere on expert APEX development:

Easy Oracle HTML-DB Application Express
By Michael Cunningham & Kent Crotty

Only $27.95

Buy it now and get the code depot download




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