Can I make starting point same to every version of Illustrator?

Hi. I made a simple script.

var docRef = activeDocument;
var X = 0;
var Y = 0;
var rect = docRef.pathItems.rectangle(X, Y, 10, 10);

And, It makes different result between CS3 and CS5.

(See below capture image please.)

I want to make starting point same to every version of Illustrator.

Can I do that?

If you have answer, please share me.

Thank you for reading.