Allow multiple selection from dropdowns

Can't be done. It's not in the nature of a drop down list, at least not normal drop lists.

If you wanted to get fancy you could build your own drop-down like list by combining a multiple select list with an text field and an button. Make the list invisible and displaying it when the button is pushed.

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]

Thanks Thom, I'll give 'fancy' a go.

Thom I just wanted to report, that I did as you suggested and now have some gorgeous 'fake' dropdowns that look and behave exactly as the standard dropdowns, except the user can do multi-selection. Many thanks for your help.

Good Work!! Using fields in a "Creative" way is not always easy. But this was a good one. Glad you got the details worked out.

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]