<%= select_tag 'available_columns', options_for_select((query.available_columns - query.columns).collect {|column| [column.caption, column.name]}), :multiple => true, :size => 10, :style => "width:150px" %>

<%= select_tag 'query[column_names][]', options_for_select(query.columns.collect {|column| [column.caption, column.name]}), :id => 'selected_columns', :multiple => true, :size => 10, :style => "width:150px" %>

<% content_for :header_tags do %> <%= javascript_include_tag 'select_list_move' %> <% end %>