Rails - Mar 2009 - how to add onchanget event to select field

Hello,
I would like to add javascript ''onChange'' event handling for a
select
field, such as
    <div class="form_row">
        <label for="s_modify">Modifiers</label>
        <%= form.select :s_modify, ([ "Frequency",
"Genotype",
"Germline", "Group", "Haplotype",  ,
"Metagenomic", "Pathovar",
"Plasmid-name", "Plastid-name", "Pop-variant"  ,
"Rearranged",
"Segment",  "Subclone", "Subgroup",
"Substrain", "Subtype", "Synonym",
"Transgenic", "Type", "Variety" ]) %>
      <label for="vaule_sm">Value</label>
       <%= form.text_field :vaule_sm%>
     </div>

by if  user select Metagenomic or ''Germline or
''Rearranged'' or
''Transgeni.

the vaule_sm is "TRUE"

Anyone know how to make this work?

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---