public static void Loading()

    {

        HttpContext hc = HttpContext.Current;

        hc.Response.Write("<div id='loading'> ");

        hc.Response.Write("<img src='loading.gif'/> ");

        hc.Response.Write("</div>");

        hc.Response.Write("<script type=text/javascript>");

        hc.Response.Write("function document.onreadystatechange()");

        hc.Response.Write(@"{ try  

                                   {

                                     if (document.readyState == 'complete') 

                                    {

                                          delNode('loading');

                                         

                                    }

                                    }

                                  catch(e)

                                     {