ASP.NET

<select id="sel1"><option>came here first!</option></select>
<select id="sel2"><option>came here second!</option></select>

<input id="send" type="button" value="Send Date" />
//anywhere in your default.aspx insert this:
    <asp:ScriptManager ID="test" runat="server">
        <Services>
            <asp:ServiceReference Path="test.asmx" />
        </Services>
    </asp:ScriptManager>

<script type="javascript/text">
    $(function(){
         if (typeof (Sys) !== "undefined") Sys.Application.notifyScriptLoaded();
         $('#send').click(function(){
               $sel1_value = $('#sel1').val();
               $sel2_value = $('#sel2').val();
               test.SendData($sel1_value, $sel2_value, SendSuccess, SendFailed);
          });
          function SendSuccess(result, eventArgs)
          {
              alert(result);
          }
          function SendFailed(error)
          {
              alert(error);//server side exception
          }
     });
</script>

//uncomment whatever you are asked to uncomment in this class
[WebMethod]
public string SendDate(string sel1, string sel2)
{
    //process your received data here using the passed parameters
    //care to return response if need be!
    return "...holla! i got here last!!!";
}

MorgSim wrote:

I hope this will help u

MorgSim wrote:

use ajax to send you newely populated data back to the server.

Mark Nischalke wrote:

Hope what helps?

<%@ Page MaintainScrollPositionOnPostback="true" %>

<pages maintainScrollPositionOnPostBack="true" />