Nested insert_html bug : Ruby On Rails & Javascript

Question

Hey everyone! This problem is driving me absolutely insane! It seems like a bug in the rendering of JS by Rails but I'm not sure.

Brief synopsis:

I'm attempting to create a RELEASE which has_many TRACKs. These TRACKS have many TRACK_LINKS. These TRACK_LINKs then have associated TRACK_LINK_TYPEs (mp3, m3u, podcast, whatever). Think of it like an Album. So when adding a release, you can add the album tracks, and each album track can have different links (mp3, m3u, podcast, whatever). I'm at a very early stage and leveraging scaffolding - the user can create a release on the form, add tracks via JS and add track links via JS. This all works fine - but adding tracks does not work when I have the "Add Track Link" function in the code! It silently fails - no error, just goes to the # anchor.

In the main Release form i am rendering the TRACK partial and adding the link to add TRACKs:

<div id="tracks">
    <%= render :partial => 'track', :collection => @release.tracks -%>
</div>

<%= add_track -%>

Now in the TRACK partial, I am rendering the TRACK_LINK partial and adding the link to add TRACK_LINKs:

<div class="track">
    <fieldset>
    <legend>Track</legend>
    <p> 
        <% @track = track %>
 <%= error_messages_for :track -%>

        <% fields_for_track(track) do |track_form| -%>
        Track Name
 <br />
 <%= track_form.text_field :name -%>
 <%= link_to_function "remove", "$(this).up('.track').remove()" -%>
 <% track_links_id = "track_links_#{Time.now.to_i.to_s}" %>
 <div id="<%= track_links_id %>">
            <%= render :partial => 'track_link', :collection => @track.track_links -%>       
 </div>
 <%= add_track_link track_links_id -%> 
    <% end -%>
    </p>
</fieldset>
</div>

And in the TRACK_LINK partial, I am creating the TRACK_LINK fields (with their associated TRACK_LINK_TYPE field):

<div class="track_link">
    <% @track_link = track_link -%>
<% fields_for_track_link(track_link) do |track_link_form| -%>
    Track Link
    <br />
    <%= track_link_form.text_field :url -%>
    <%= select ("track_link_type", "id", @track_link_type.map {|type| [type.name, type.id]}) -%>  
        <%= link_to_function "remove", "$(this).up('.track_link').remove()" -%>  
<% end -%>
</div>

Finally, here are the link_to_function helper methods:

module ReleasesHelper
    def fields_for_track(track, &block)
        prefix = track.new_record? ? 'new' : 'existing'
        fields_for("release[#{prefix}_track_attributes][]", track, &block)
    end

    def fields_for_track_link(track_link, &block)
        prefix = track_link.new_record? ? 'new' : 'existing'
        fields_for("track[#{prefix}_track_link_attributes][]", track_link, &block)
    end

    def add_track
        track = Track.new
        track.track_links.build
        link_to_function 'Add Track' do |page| 
            page.insert_html :bottom, :tracks, :partial => 'track', :object => track
    end
end

    def add_track_link(name)
        link_to_function "Add Track Link" do |page|       
            page.insert_html :bottom, name, :partial => 'track_link', :object => TrackLink.new
    end
end
end

The outcome is that each link_to_function works fine, but when I have the "Add Track" and "Add Track Link" functions at the same time, the "Add Track" link_to_function doesn't work. Something about it rendering the "Add Track Link" function is messing it up! Apologies for the long ass post! Hopefully its not annoying and someone can lend a hand?

best, Praveen