saving a form with a trusted function

Hi All
 
im trying to create a saveAs function for a form I have created. I want to take away as much of thought process away from the users as the simple saveas got them all confused bless!!!
 
So what im trying to achieve, is a save button that saves the form to a specified location with a unique name and then sends an email to another person who then has to sign of the form the email part I think I can achieve its the saveAs and the trusted function aspect that i cannot get my head around im not a java programmer the script below script seemed to work but came back with a message:
 
NotAllowedError: Security settings prevent access to this property or method.
Doc.saveAs:52:AcroForm:Button 1:Annot1:MouseUp:Action1
 
function DoesFileExists(pathname)
{
var result = false;
try
{
var otherDoc = app.openDoc(pathname);
if (otherDoc != null)
{
result = true;
otherDoc.closeDoc();
}
}
catch(e)
{
result = false;
}
return result;
}
 
// create a unique filename for output file
function GetUniqueOutputFileName(pathName)
{
var i = 1;
var baseName = pathName.slice(0, pathName.length - 4);
var testName = pathName;
while (DoesFileExists(testName) == true)
{
testName = baseName + " " + i + ".pdf";
i++;
}
return testName;
}
 
var i = this.path.search(/[^:/]+\.pdf$/);
var fname = this.path.slice(i, this.path.length - 4);
 
// replace /c/data/ with a desired folder path where to store extracted files
var folder = "/m/testpdf/";
 
// now add time stamp data to the filename
var t = new Date();
fname += " - " + t.toLocaleString();
var outputname = fname.replace(/[,\\/\?*<>]/g," ");
outputname = outputname.replace(/[:]/g,"-");
 
var outputpath = folder + outputname + ".pdf";
this.saveAs(GetUniqueOutputFileName(outputpath));
 
So I added what I think is a trusted function from article on here but now im getting a syntax error no formal parameters
 
// trusted saveAs Function
var saveAs = app.trustedFunction(
function(this.saveAs(GetUniqueOutputFileName(outputpath))
{
app.beginPriv();
this.saveAs(GetUniqueOutputFileName(outputpath));
app.endPriv();
}
);