$(function () {
$("#catalog").accordion();
$("#catalog li").draggable({
appendTo: "body",
helper: "clone",
connectToSortable: "#cart ol"
});
$("#cart ol").sortable({
items: "li:not(.placeholder)",
connectWith: "li",
sort: function () {
$(this).removeClass("ui-state-default");
},
over: function () {
//hides the placeholder when the item is over the sortable
$(".placeholder").hide();
},
out: function () {
if ($(this).children(":not(.placeholder)").length == 0) {
//shows the placeholder again if there are no items in the list
$(".placeholder").show();
}
}
});
});