$("#sortable1").sortable({
connectWith: ".connectedSortable",
forcePlaceholderSize: false,
helper: function (e, li) {
copyHelper = li.clone().insertAfter(li);
return li.clone();
},
stop: function () {
copyHelper && copyHelper.remove();
}
});
$(".connectedSortable").sortable({
receive: function (e, ui) {
copyHelper = null;
}
});