duplicate layer to different document

Hi All,

I'm new to javascript and would like a little help please!!

I recently found a script that creates a new layer in the active document and then duplicates the contents of 'Layer 1' of the active doc to it.

#target illustrator

var docRef = app.activeDocument;

with(docRef) {

     var ln = 'Layer 1'

     var ol = layers.getByName(ln);

     var nl = layers.add();

     nl.name = ln+' Copy';

     for (var a = ol.pageItems.length-1; a >= 0; a--) {

          ol.pageItems[a].duplicate(nl, ElementPlacement.PLACEATBEGINNING);

     }

}