refreshing sortable_element

Here's a question:

I have a sortable collection set up with <%= sortable_element ... %>

I want to ajax more elements into the collection, but for them to work i
have to destroy the sortable and recreate it.

Is there either:

a) a way to pop more elements into a sortable through javascript, or

b) a way to scrape <script> tags off of <%= sortable_element %> so i can
wrap it in a callable javascript function instead?