I need use check_box to search function.

sample..

I got like 10 items and each item has over 10 subitems ( or whatever )
Need to check some items use check_boxes and display all subitems 
belongs to checked items.


<%= start_form_tag :action => 'find_ckecked'%>
     <table width = "100%" >
     <% @uitems.each do |item| %>
         <tr  bgcolor = "lightgray">
             <td>
             <%= check_box("item", "name" ) %>
             <%= item.name %>
             </td>
         </tr>
     <%= submit_tag "search" %>
<%= end_form_tag %>


I have no ideas how to do that please if some body did that before could 
  give some clues ?!