Auto-populate Field value From a File Picker Window

Question

I have a PDF form with many fields where my users are required to enter the filename of documents. I am using Adobe Acrobat 9 Pro
I've been trying to find a way to create a field Action that does the following:
User clicks field
File browser window opens
User selects relevant file
Filename and extension is placed into the field that was clicked
Any tips or suggestions on how to implement this would be welcome.
Additionally, if it is possible, could it support multiple field/documents in a single interactions. Example: User clicks field1 and selects 5 files. The files filenames are placed in fields1, field2, field3, field4, and field5 respectively.
P.S.
I am not trying to attach files to the PDF. I just want the filenames to be placed into the form.

Answer 1

Are the files being selected PDF files, or other types? There's another method that can be used for file selection, but it only lists PDF files. It is possible (at least on Windows computers) to use it to select any file-type, but it's a bit tricky...
If not, using a hidden field is your only option. But you can reset if after copying the file-name to the other field, like this:
this.getField("FilePath").browseForFileToSubmit();
var filePath = this.getField("FilePath").value;
this.getField("FileName").value = filePath.substring(filePath.lastIndexOf("\\")+1);
this.getField("FilePath").value = "";
If you use this code (as the button's Mouse Up action), make sure you remove all other codes associated with the text fields. And you don't need to create a duplicate field for each file selection field, only one will do... It can even be placed in a doc-level function so you only have to call it from each button and have the code itself in a single location.