选择原始列表以保存订单。单击其中一个复选框时，对其进行迭代，首先附加选中的项目，然后附加未选中的项目：

Select the original list to save the order. When one of the checkboxes is clicked, iterate over it, appending the checked items first and the unchecked items second:

var list = $("ul"),
    origOrder = list.children();

list.on("click", ":checkbox", function() {
    var i, checked = document.createDocumentFragment(),
        unchecked = document.createDocumentFragment();
    for (i = 0; i < origOrder.length; i++) {
        if (origOrder[i].getElementsByTagName("input")[0].checked) {
            checked.appendChild(origOrder[i]);
        } else {
            unchecked.appendChild(origOrder[i]);
        }
    }
    list.append(checked).append(unchecked);
});

演示： http://jsfiddle.net/scSYV/2