Rails spinoffs - Mar 2006 - Adding elements to a sortable after initialisation

1. Is it possible to add elements to a sortable after the sortable has 
become active?  I guess just inserting new li elements into the list 
won''t be enough, is there a way to tell the sortable that it has a new 
element?

2. Can I change the containment settings of a sortable after it is 
active? I want to add sortables dynamically and want to enable moving 
sortables between this new sortable and already existing ones.

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