How to Layer Duplicate to active document ?

[nandu nag]

The layer is being duplicated from the photoshop javascript given below but it is not happening in the active document any help

var sourceDoc = activeDocument;
var sourceLayerName = sourceDoc.activeLayer.name;
var openDocCount = documents.length;
var targetDocIndex = openDocCount - 2;
var targetDocName = documents[targetDocIndex].name;
dupeLayer(sourceLayerName);

function dupeLayer() {
	function s2t(s) {
        return app.stringIDToTypeID(s);
    }
	var descriptor = new ActionDescriptor();
	var list = new ActionList();
	var reference = new ActionReference();
	var reference2 = new ActionReference();
	reference.putEnumerated( s2t( "layer" ), s2t( "ordinal" ), s2t( "targetEnum" ));
	descriptor.putReference( s2t( "null" ), reference );
	reference2.putName( s2t( "document" ), targetDocName );
	descriptor.putReference( s2t( "to" ), reference2 );
	descriptor.putString( s2t( "name" ), sourceLayerName );
	descriptor.putList( s2t( "ID" ), list );
	executeAction( s2t( "duplicate" ), descriptor, DialogModes.NO );
	sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
}

[nandu nag]

Whatever document is open after the source document is closed, paste the selected layers in that document by whatever name it may be by any number.
modify this code