Create temp pdf file using javascript

[RJ9191]

I want to create a temporary pdf file of active document which will have multiple artboard  in a single pdf file,and artboards can have any combination as per user input.Like if a document have 4 artboards then range can be 1-2,1-3,1-4,2-4 etc.

var doc = app.activeDocument;

            if ( app.documents.length > 0 ) {

            var saveName = new File ( "dest" );

             saveOpts = new PDFSaveOptions();

             pdfSaveOptions.SaveMultipleArtboards = true;

            saveOpts.artboardRange="1-3";

            doc.saveAs( saveName, saveOpts );

            }

i have tried this code but no luck and also this code opening a dialog to save which i don't want,plz help thanks in advance.

[moluapple]

Please delete this line and try again:

pdfSaveOptions.SaveMultipleArtboards = true;

[RJ9191]

This code is opening a dialog and also not setting the range which i have given 1-3,I do not want this dialog i want to save a temporary file or need to use save as copy it is saving the current doc as pdf which i don't want.