🚀 go-pugleaf

I have a problem with INdesign JavaScripting

Now I Copy and Paste some object from a document to another,
I repeat this action many times. It's Slow

I think to
Save in a Array the objects to copy
and then I use the array elements to duplicate the single Object in my document

write some lines like this but it doesn't work

Documento=app.activeDocument;
//PUT THE OBJECT IN ARRAY
var Selezione = new Array()
Selezione.unshift(Documento.selection)

//After I think to use toSource() in this way
//CREATE A NEW ELEMENT LIKE THE ORIGINAL

eval(Selezione[0].toSource())

Mybe I don't understand the Method toSource()!

Thanks