//Display a standard Open File dialog box.
var myPDFFile = File.openDialog("Choose a PDF File");
if((myPDFFile != "")&&(myPDFFile != null)){
	var myDocument, myPage;
		myDocument = app.documents.add();

var myN = "";
for (var i=(myPDFFile.parent.toString().length+2); i<myPDFFile.fsName.toString().length; i++) {

    myN = myN + myPDFFile.fsName.toString()[i];

    }


// salva preferenza misure
var myOldXUnits = app.activeDocument.viewPreferences.horizontalMeasurementUnits;
var myOldYUnits = app.activeDocument.viewPreferences.verticalMeasurementUnits;
//Set the measurement units to mm
app.activeDocument.viewPreferences.horizontalMeasurementUnits = MeasurementUnits.millimeters;
app.activeDocument.viewPreferences.verticalMeasurementUnits = MeasurementUnits.millimeters;

with(myDocument.documentPreferences){
		pageHeight = 700;
		pageWidth = 500;
	}

    myPage = myDocument.pages.item(0);
    myPDFPage = myPage.place(File(myPDFFile), [0,0])[0];


	//selezioni contenitore
    mBox = myPDFPage.parent;

    //dimensione 500x700mm
    mBox.geometricBounds = [0,0, 700, 500];

    //adatta dimensione contenuto
    mBox.fit(FitOptions.contentToFrame);

    //centra contenuto
    mBox.fit(FitOptions.centerContent);

    //seleziona cartella
	myFolder= Folder.selectDialog ("Choose a Folder");

    if(myFolder != null){

            if(File.fs == "Macintosh"){

                myFilePath = myFolder.fsName + "/" + myN;
                app.activeDocument.exportFile(ExportFormat.pdfType, myFilePath, false);

			}
			else{

                myFilePath = myFolder.fsName + "/" + myPDFFile.displayName;
                app.activeDocument.exportFile(ExportFormat.pdfType, myFilePath, false);

			}

          }


//Reset measurement units to their original values.
app.activeDocument.viewPreferences.horizontalMeasurementUnits = myOldXUnits;
app.activeDocument.viewPreferences.verticalMeasurementUnits = myOldYUnits;

}