Multiple selection

[#1]

Hi all, I need to make a multiple selection.

I have several listboxes and I need that when I select a value in the first, in the second listbox appears the same value selected in green.

For example:

       list box 1     list box 2

       John           John

        anne            Tony

        Louis           Michael

If I select John in First listbox, John appears selected in the second. In green both

Thanks so much!!

[#2]

Thanks to all!!!!