autocomplete เวลากดปุ่มค้นหาแล้ว อยากให้ค่าที่ค้นหาใน autocomplete ยังอยู่อ่ะค่ะ

<asp:Content ID="Header" runat="server" ContentPlaceHolderID="headerContent">
    <link href="Styles/jquery-ui.css" rel="stylesheet" type="text/css" />
    <link href="Styles/960grid.css" rel="stylesheet" type="text/css" />

   
    <link href="Styles/button.css" rel="stylesheet" type="text/css" />
    <script src="Scripts/jquery-1.9.1.js" type="text/javascript"></script>
    <script src="Scripts/jquery-ui-1.10.3.custom.min.js" type="text/javascript"></script>
    <script src="Scripts/ui.dropdownchecklist-1.4-min.js" type="text/javascript"></script>
    <script src="Scripts/ui/jquery.ui.autocomplete.js" type="text/javascript"></script>
    <style type="text/css">
       
                  <script type ="text/javascript">
       $(function () {
           var availableTags = [
           <% 
                   For index as Integer = 0 To dt2.Rows.Count-1
                       Response.Write("{value : """ & dt2.Rows(index)(0).toString() & """,label : """ & dt2.Rows(index)(1).toString() & """},")
                   Next
                   %>
           {label : "" , value: ""}];
           $("#txtSearch2").autocomplete({
               source: availableTags , 
               select: function( event, ui ) {
               
                  $("#bodyContent_station_data").val(ui.item.value);
                  $("#txtSearch2").val(ui.item.label);

                 return false;
               },
                    focus: function (e,ui) {
                        $("#txtSearch2").val(ui.item.label);
                        $("#txtSearch2").val(ui.item.label);
                    
                        return false;
                    }
           });
       });
       
    </script>
   

</asp:Content>

<asp:Content ID="Body" runat="server" ContentPlaceHolderID="bodyContent">
        
        <input  type="hidden" name="station_data"  id="station_data" value=""  runat="server" />
       

        <div id="tabs"  style="font-size: 14px;">
            <ul>
                <li><a href="#tabs-1" style="color: #000080; font-weight: bold"><strong>a</strong></a></li>
                <li><a href="#tabs-2" style="color: #000080; font-weight: bold"><strong>b</strong></a></li>
            </ul>
            <div id="tabs-1"  style="overflow:hidden"> 
  </div>
           <div id="tabs-2">
                 <table>
             <tr>              
                <td class="style3" ><strong>คำที่ต้องการค้นหา</strong></td>
                <td class="style5">    

                <input type="text" id="txtSearch2" class="autosuggest" 
        style="border: thin groove #666666"/>

                </td>
                <td align="left" class="style7">
                    <asp:Button ID="btnSearch2" runat="server" Text="ค้นหา" 
                        CssClass="button green" Width="118px" BorderColor="#666666" /></td>

             </tr>
             <tr>
                <td colspan="2">
                      <asp:Label ID="Label4" runat="server" Font-Size="Smaller"></asp:Label> 
                                         runat="server" Font-Size="Smaller"></asp:Label>
                    </td>
             </tr>
             <tr>
                <td colspan="2">

                    </td>
             </tr>
               <asp:GridView ID="GridView2" runat="server" Width="800px" 
                AutoGenerateColumns="true" HorizontalAlign="Center">

            </asp:GridView>
           </table>  
           </div>
</div>
   
 </asp:Content>