JS获取不到repeater控件的值
alert获取到空值
可以如何解决？请指教，感谢!

       function control_Onchange(control) {



                var td = this.parentNode;

                var td = control.parentNode; //得到该控件所在的td

                var tr = td.parentNode; //得到tr

                var ex_allowance = $($(tr).children('td').eq(1).children('input').eq(0)).text();



                alert(ex_allowance);

                return;

       }

  <asp:Repeater ID="Repeater1" runat="server">

        <HeaderTemplate>

         <table id="tb1">

        </HeaderTemplate>

            <ItemTemplate>

                <tr>

                        <td>

                            <asp:TextBox ID="txtEx_allowance" onblur="control_Onchange(this)" runat="server" Width="40"></asp:TextBox>

                        </td>

                        <td><asp:TextBox ID="txtNon_fixed_allowance" runat="server" Width="40"></asp:TextBox></td>

                </tr>         

            </ItemTemplate>



        <FooterTemplate>

                </table>

        </FooterTemplate>

 </asp:Repeater>

------解决方案--------------------
function control_Onchange(control) {
    alert($("td:eq(1) input:eq(0)", $(control).parent().parent()).val());
}