JQuery drag and drop to making a flow model or binary tree

JQuery drag and drop to making a flow model or binary tree

I have a OL with three LI. When I drop an element onto that ol it creates a new LI node. This new LI node needs to allow other similar elements to be dropped on it but it isn't recognized as droppable. How do I update the DOM or the jQuery object to know that the new nodes are droppable? thanks in advance


Js fiddle