Move items from one listbox to another using jQuery

I have two listboxes - list1, list2. There are four buttons. Add button to move selected items from one listbox to another. AddAll button to move all items from one listbox to another. Remove and RemoveAll buttons do the reverse operation. The code below shows how this can be done using jQuery.

HTML

    <div>
        <asp:ListBox ID="list1" runat="server">
            <asp:ListItem Text="One"></asp:ListItem>
            <asp:ListItem Text="Two"></asp:ListItem>
            <asp:ListItem Text="Three"></asp:ListItem>
        </asp:ListBox>
        <asp:Button ID="btnAdd" runat="server" Text=">" />
        <asp:Button ID="btnAddAll" runat="server" Text=">>" />
        <asp:Button ID="btnRemove" runat="server" Text="<"/>
        <asp:Button ID="btnRemoveAll" runat="server" Text="<<" />
        <asp:ListBox ID="list2" runat="server"></asp:ListBox>
    </div>

Javascript

<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script type="text/javascript">
    $(document).ready(
        function () {
            $('#btnAdd').click(
                function (e) {
                    $('#list1 > option:selected').appendTo('#list2');
                    e.preventDefault();
                });

                $('#btnAddAll').click(
                function (e) {
                    $('#list1 > option').appendTo('#list2');
                    e.preventDefault();
                });

                $('#btnRemove').click(
                function (e) {
                    $('#list2 > option:selected').appendTo('#list1');
                    e.preventDefault();
                });

                $('#btnRemoveAll').click(
                function (e) {
                    $('#list2 > option').appendTo('#list1');
                    e.preventDefault();
                });
 
        });
</script>

The selector for selecting items in a listbox is $('list1 > option:selected'). AppendTo function moves item from one element to another. e.preventDefault prevents event bubbling so that the page is not posted back.