How to get an Adobe trusted function javascript to save a pdf form even if fields are empty?

Question

I have a form I have created in Livecycle designer which I want to save to a specific location using a combination of specific fields in the form. I have been able to do this by writing a trusted function and putting it in the adobe javascript file and then putting some code on a save button in the form. However, it may be that some of the fields (vfirstname and vsecondname) may be blank and i still want the form to save. Ideally i want to write an if statement to substitute those fields for other fields if they are blank but cant get the code to  work.
Working code in trusted function file
// SaveAs Function1 var mySaveDoc = app.trustedFunction(function(doc) { app.beginPriv(); var vDate1 = event.target.xfa.resolveNode("form1.page1.Table1.Row1.leftsideofform.Timeanddate.Dateofca ll").rawValue.toString(); var vfirstname = event.target.xfa.resolveNode(" form1.page1.Table1.Row1.rightsideofform.Prospectiveclient.ClientFirstname").rawValue.toSt ring(); var vsecondname = event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Prospectiveclient.C lientsurname").rawValue.toString(); var myPath = "/MGLCC01-SV/MGPdata/Mihomecare/testce/" + vDate1 +"_" + vfirstname + "-" + vsecondname + ".pdf"; // saveAs is the only privileged code that needs to be enclosed doc.saveAs({cPath: myPath, bCopy: true, bPromptToOverwrite: true}); app.endPriv(); }); 
Working code on save button in form
form1.#pageSet[0].Newenquirymasterpage.Button1::mouseUp - (JavaScript, client) var txt = form1.execValidate(); //This script will validate all required fields event.target.mySaveDoc(event.target) xfa.host.messageBox("Document has been saved to shared drive", "File Saved", 3, 1); 
IF code for trusted function file that I cant get to work
// SaveAs Function1 var mySaveDoc = app.trustedFunction(function(doc) { app.beginPriv(); var vDate1 = event.target.xfa.resolveNode("form1.page1.Table1.Row1.leftsideofform.Timeanddate.Dateofca ll").rawValue.toString(); if (event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Prospectiveclient. ClientFirstname").rawValue == " ")      {          var vfirstname = event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Enquirer.EnquFirstn ame").rawValue.toString();      }      else      {          var vfirstname = event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Prospectiveclient.C lientFirstname").rawValue.toString();      }     if (event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Prospectiveclient. Clientsurname").rawValue == " ")      {          var vsecondname = event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Enquirer.Enqsurname ").rawValue.toString();      }      else      {          var vsecondname = event.target.xfa.resolveNode("form1.page1.Table1.Row1.rightsideofform.Prospectiveclient.C lientsurname").rawValue.toString();      } var myPath = "/MGLCC01-SV/MGPdata/Mihomecare/testce/" + vDate1 +"_" + vfirstname + "-" + vsecondname + ".pdf"; // saveAs is the only privileged code that needs to be enclosed doc.saveAs({cPath: myPath, bCopy: true, bPromptToOverwrite: true}); app.endPriv(); }); 
Can anyone suggest why the If code above doesn't work? or how i could get the form to submit even if the fields are blank?

Answer 1

It can also work if you certify the document and each user chooses to trust it to execute privileged JavaScript, which may be feasible in this setting. The method you'd use is doc.saveAs: http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.524.html
Also, read the following tutorial: http://acrobatusers.com/tutorials/how-save-pdf-acrobat-javascript