PDF with Required Fields

As you already know, Acrobat provides a range of built-in features for controling form interaction. All of these built in features are either simple and straight forward, like the default form field formatting and validation, or very narrow, like the form distribution wizard.

Most of the interactive features are programable, so if you want more flexibility you'll have to learn some JavaScript. For example, to display an alert when the user leaves a field without entering anything you could create a custom validation script like this:

if(/^\s*$/.test(event.value))
app.alert("Empty Field");

Actually you might want to use an OnBlur event, or a combination to get the right action. But JavaScript is the trick.

Thom Parker
The source for PDF Scripting Info
[url=http://www.pdfScripting.com]pdfscripting.com[/url]

The Acrobat JavaScript Reference, Use it Early and Often
[url=http://www.adobe.com/devnet/acrobat/javascript.php]http://www.adobe.com/devnet/acrobat/javascript.php[/url]

Then most important JavaScript Development tool in Acrobat
[url=http://www.pdfscripting.com/public/34.cfm#JSIntro][b]The Console Window (Video tutorial)[/b][/url]
[url=http://www.acrobatusers.com/tutorials/2006/javascript_console][b]The Console Window(article)[/b][/url]