insert listbox items in database using javascript

See more:

C#

ASP.NET

Javascript

hi,
i used javascript(on double click) for moving items from first listbox to second listbox..
and want to second listbox items store in database
but i am fail to do this..
hard work and hard search i ask you here.
so please help me...i need the solution for my site..

i have two tables
1) star_master
and
2) profile_star


two listboxes
1) lst_leftstar
2) lst_rightstar

lst_leftstar is display(load) from star_aster table
and lst_rightstar will be blank..

select(doubleclcik on) items for move items lst_leftstar to lst_rightstar
and lst_rightstar items will be store in database....
i tried too much..but my coding is failed here...
coz when i click on submit button "lst_rightstar" show me 0 items in loop.
my javascript coding is :=

<script type="text/javascript">        /* star  */
        function lst_left_star_DblClicked() {
            var left_lst = document.getElementById("<%=lst_leftstar.ClientID%>");
            var right_lst = document.getElementById("<%=lst_rightstar.ClientID%>");

            for (var i = 0; i < left_lst.length; i++) {
                if (left_lst.options[i].selected == true) {
                    right_lst.options[right_lst.length] =
            new Option(left_lst.options[i].text,
            left_lst.options[i].value);
                    left_lst.options[i] = null;
                    i = i - 1;
                }
            }
            return;
        }
    </script>

<script type="text/javascript">
        function lst_right_star_DblClicked() {
            var left_lst = document.getElementById("<%=lst_leftstar.ClientID%>");
            var right_lst = document.getElementById("<%=lst_rightstar.ClientID%>");

            for (var i = 0; i < right_lst.length; i++) {
                if (right_lst.options[i].selected == true) {
                    left_lst.options[left_lst.length] = new Option(right_lst.options[i].text, right_lst.options[i].value);
                    right_lst.options[i] = null;
                    i = i - 1;
                }
            }
            return;
        }
    </script>

<asp:ListBox ID="lst_leftstar" onDblClick="lst_left_star_DblClicked();" runat="server"
                                Height="100px" Width="180px"></asp:ListBox>

<asp:ListBox ID="lst_rightstar" onDblClick="lst_right_star_DblClicked();" runat="server"
                                Height="100px" Width="180px"></asp:ListBox>

please tell me how can i stored my listbox items in database.
i tried but not success...