link_to_remote and open new window passing parameters

I would like to implement this:
I have a view that shows a list of elements. Each element have a
checkbox. The user can select some events marking the checkbox and click
the link_to_remote "Print this elements". When this link is clicked
another window is open with only the selected events and is printed (ala
Google Maps).

I have coded the selection of items and I'm able to open a new window. I
use the link_to_remote like this:

<%= link_to_remote 'Imprimir incidencias marcadas',
{ :url => '/incidencias/popup',
  :submit => 'table'
} %>

The elements are submited properly. I know how to open the new window:


page << "'/events/print', 'print',
'left=20,top=20,width=500,height=500,toolbar=1,resizable=0' );"

But I don't know how to pass the list of elements from popup.rjs to
/events/print in the new window!!

Any idea will be appreciated.