Specify location of FDF save

Question

Hi - I have hundreds of AcroForms that collect commonly used information (names, addresses, tel, etc) as part of the forms.  These forms are stand-alone, and are downloaded by users to their local systems as empty/blank forms, and given the problems with data protection, we will not entertain the idea of maintaining a server that collects this information. My users find the autocomplete function unsatisfactory, and they would like the common fields to automatically be filled in when they open the forms.
As a solution, I designed a single form (PersonalVariables) that has all the common fields, with a button to save the FDF locally. All other forms are configured with the same fields and are configured to import the FDF on Page Open, but of course I have to specify where and what FDF is going to be imported.
What I have currently is:
n=app.alert("This will save your personal information for use throughout the Forms range' ",3,0);
this.exportAsFDF("http://localhost/PersonalVariables_data.fdf");
But this ignores the location and defaults to the last used location with the PDF filename. So, the question is: how do I force the FDF to be save in a specified location?
Any help much appreciated.

Answer 1

Thanks George - as you can tell, I'm a bit of a newbie at this, so bear with me. Thanks for the link - I had not seen reference to this before in all my searches. So now the export looks like this:
this.exportAsFDF(true, true, null, false, "C:\PersonalVariables.fdf");
This does not appear to do anything - what have I got wrong??