instance objects on empty obj pos

Hello and thank you in advance.
I am currently developing a scene with lots of polygon.
I would like to instances other than with translate.
I wish to place named empty object (empty_1, empty_2 …) in my scene.
In javascript a function searching all empty objects whose names begin with "empty" catch the position of each empty in order to duplicate the object.
Are there already was an article talking about some things similar?

Thanks a lot for help

Hello,

We have a nice instancing example. It is acting just as you've described: https://www.blend4web.com/apps/code_snippets/code_snippets.html?scene=instancing

Thanks a lot!
I save 4mb.
www.jeanclaudestephane.com/High_machine_instance/menu_high_instance.htm