retrive elements with multiselect

[nabbo]

Hello

I want to know how to get the elements in multi-select mode, in
javascript (and then php) side.

in the (last) example, the button "delete" only counts the number of
selected elements :

confirm('Delete ' + $('.trSelected',grid).length + ' items?')


What I want is to get the elements selected, by their ID (for example
the ISO codes in the example)

How can I do that ?

Thanks