Live Search problems - HELP

I’m trying to make a live search for my site. Nothing is working, and
I’m getting a javascript error that says “Form is not defined”, but I
don’t think that’s my only problem.

This is my view:

<%= form_remote_tag(
:url => {:controller => ‘inventory’, :action => ‘search’},
:update => “results” )%>

Loading...
<% end_form_tag %>

<%= observe_field( ‘search’, :frequency => 0.5,
:url => {:controller => ‘inventory’, :action => ‘search’},
:update => :results,
:loading => “Element.show(‘loading’);”,
:complete => “Element.hide(‘loading’);”,
:with => “‘search=’ + escape($F(‘search’))”
) %>

Here’s my controller:

def search
if @params[‘search’]
@items = Content.find(:all,
:conditions => [ ‘LOWER(post) LIKE ? or LOWER(title) LIKE
?’,
‘%’ + @params[‘search’].downcase + ‘%’,
‘%’ + @params[‘search’].downcase + ‘%’],
:order => “id desc”)
@mark_term = @params[‘search’]
render_without_layout
end
end

This might be way off, but I’m trying to follow examples and what I
think might work. I can’t get anything at all so far, though.

Can someone please help me out???

Thanks!