rendering a html.erb in rails with javascript -

i create page , parts of layout files rendered. want render 1 of these rendered part again javascript code.

i want render these part again

<div id="dialog" title="bookmark folders" style="resize: both;">         <%=render "layouts/filetree.html.erb"%> </div> 

it render function creates this:

<div id="accordion">     <% @user.folders.each |f| %> <h3 id="<%= f.folder_name%>" class="folderbar"><a href="#" class="foldername"><b id="foldername"><%= f.folder_name%></b> created <%=distance_of_time_in_words(f.created_at, time.now)%> before</a></h3>     <div class="<%= f.folder_name.delete(" ")%>">         <%if f.docs.empty?%>         <b>-no document currently!-</b>         <%else%>         <% f.docs.each |r|%>         <a href="<%=r.url%>" style = "color:#0066cc;"><%= r.title%></a><br/>         <b><%=r.url%></b><br />          <%= r.snippet%><hr/>         <%end%>         <%end%>     </div>     <%end%> </div> 

because after execution there changes on "folders", want render part again see update.

you shouldn't attempt render erb javascript - it's not how it's done (not mention you'd have write erb parser , call server data anyway).

if on other hand, you're asking how issue render of template using javasript , replace old content new 1 then...

watch http://railscasts.com/episodes/205-unobtrusive-javascript, read rails 3 , rjs idea of how trigger content updates via javascript.

general idea is

1. render initial full page
2. trigger ajax call (either after time or manual user request) request rails application
3. handle request , respond javascript script (the script content should contain functionality , content replace want)