See demo http://jsfiddle.net/nivea75ml/5NhFA/1/.
Here, the green blocks at bottom which can be dragged and dropped into the dark gary area. Also I want the 3 blocks are sortable, for example, if the Block2 are dragged into dark gray area first and the Block3 should move to the Block2's position.
Currently the sortable function is working without Draggable & Droppable, view it at http://jsfiddle.net/nivea75ml/sNnAe/. However it doesn't work with Draggable & Droppable, see http://jsfiddle.net/nivea75ml/5NhFA/1/.
Can anyone help me out? Thanks in advance!