app/views/invite/_contact_list.html.erb
<% friend_pos = 0 %>
<% contacts.each do |contact| %>
<% friend_pos += 1 %>
<p>
<%= check_box_tag("webmail_import_addresses[]", contact[2],
(!@webmail_import_addresses || @webmail_import_addresses.include?(contact[2])),
:id => "contacts_to_invite_#{friend_pos}",
:class => "contact_to_invite" )
%>
<label for="<%= "contacts_to_invite_#{friend_pos}" %>"><%= "#{contact[0]} (#{contact[1]})" %></label>
</p>
<% end %>