Ciao a tutti.

Sto cercando di far funzionare questa pagina di loading, ma con scarso risultato, infatti l'errore è:
Codice PHP:
Errore    1    Il nome 'destURL' non esiste nel contesto corrente. 
Potete aiutarmi?
Grazie
codice:
<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Loading</title>
    
<script type="text/javascript" language="javascript">

    var ctr = 1;
    var ctrMax = 50;
    var intervalId;

    function Begin() {
        window.location.href = "<%=destURL %>";
        intervalId = window.setInterval("ctr=UpdateIndicator(ctr, ctrMax)", 500);

    }

    function End() {
        window.clearInterval(intervalId);
    }

    function UpdateIndicator(curCtr, ctrMaxIterations) {
        curCtr += 1;
        if (curCtr <= ctrMaxIterations) {
            document.getElementById("indicator").style.width = curCtr * 10 + "px";
            return curCtr;
        }
        else {
            document.getElementById("indicator").style.width = 0;
            return 1;
        }
    }

</script>

<script runat="server">

    public partial class loading : System.Web.UI.Page
    {

        protected string destURL = "";
        protected void Page_Load(object sender, System.EventArgs e)
        {

            if (Request.QueryString["DestPage"] != null)
            {
                destURL = Request.QueryString["DestPage"].ToString();
                foreach (string k in Request.QueryString.AllKeys)
                {
                    if (k != "DestPage")
                    {

                        destURL += "&" + k + "=" + Request.QueryString[k].ToString();
                    }
                }
            }
            else
            {
                destURL = "http://www.google.it";
            }

        }
    }  
    
    
    </script>

</head>

<body onload="Begin()" onunload="End()">
    <form id="form1" runat="server">
    <div>
    <h3>Loading data please wait</h3>
    </div>
<table id="indicator" border="0" cellpadding="0" cellspacing="0" width="0">
<tr><td align="center"></td>
</tr>
</table>

    </form>
</body>
</html>