how to revert position of a jquery UI draggable based on condition

Question

I have an element which is draggable and an element which is droppable. Once the dragged item is dropped on the dropzone I am trying to execute the following jquery psuedo c

Answer 1

I found that if I simply set top:0 and left:0, the item is no longer draggable. In order to "force" a revert I had to do this:

$draggedObj.css({ top: 0, left: 0 })
$draggedObj.draggable( "destroy" )
$draggedObj.draggable({...whatever my draggable options are...});