I am new to ROR. I am trying to show a "Others" text field only if the selected value is "others". I am trying to make hide/show function to be as general as possible, since I will need it in many controller. If anyone can help enlightening me, I will really appreciate it. BTW, I am using Rails 2.1.1 ruby 1.8.7

general_info.html.erb

<div>
    <%= f.label :location_id, "Location:" %>
    <%= f.collection_select(:location_id, Event.locations, :id, :name, {:prompt => true},
            {:onchange =>   remote_function(
                    :url => {:action => "showHideDOMOther"},
                    :with => "'selectedText='+this.options[this.selectedIndex].text + '&other_div='+'loc_other'")}) %>
</div>
<div id="loc_other" style="display:none">
    <%= f.label :location_others, "Others:" %>
    <%= f.text_field :location_others %>
</div>

info_controller.rb

def showHideDomOther
render :update do |page|
  page.showHideDOM("Others", params[:selectedText], params[:other_div])
end

end ...

application_helper.rb

def showHideDOM(targetString, selectedText, targetDiv)
if selectedText.casecmp targetString
  page.hide targetDiv
else
  page.show targetDiv
end

end

Seem to get the correct parameters value, but nothing seems to happen. This is what I see from the console when I changed the value of selection to "Others".

Parameters: {"action"=>"showHideDOMOther", "authenticity_token"=>"e7da7ce4631480b482e29da9c0fde4c026a7a70d", "other_div"=>"loc_other", "controller"=>"events", "selectedText"=>"Others"}

NoMethodError (undefined method search_generic_view_paths?' for #<EventsController:0xa41c720>): /vendor/plugins/active_scaffold/lib/extensions/generic_view_paths.rb:40:infind_template_extension_from_handler' C:/usr/lib/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_finder.rb:138:in pick_template_extension' C:/usr/lib/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/template_finder.rb:115:infile_exists?' :

Rendering C:/usr/lib/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/templates/rescues/layout.erb (internal_server_error)