add_card = (text, x, y) ->
card = $ $ "<div class=\"card\" style=\"left: #{x}px; top: #{y}px\">#{text}<br><span> </span></div>"
$table.append card
- card.draggable()
+ card.draggable stack: '.card'
card.bind 'dragstop', (event, ui) ->
p = card.position()
card.children().html("(#{p.left}, #{p.top})")