How to know the dragging element is over which element?

I have a problem with jQuery Drag&Drop. I have a draggable element and lots of dropTarget so I just want to k开发者_Python百科now when I am dragging, my dragging element is over which element?

Btw, Firefox provides event.originalTarget that points an DOM Element but it is equal to "undefined" in Google Chrome.

Any suggestion?

Thanks.

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Check out the over event on your droppables.

$('#droppableid').droppable({
    over: function(event, ui) {
        log('You are over item with id ' + this.id);
    }
});

Example here.