我的登录中有一段跳转代码

用1级用户名跳转到页面a

用2级用户名跳转到页面b

我的跳转页面中有一段脚本

<script type="text/javascript">
var a=10;
function aa(url)
{ var b;
  td1.innerHTML ="";
  a--;
  b=setTimeout("aa('"+url+"')",200);
  if(a==-1)
 { clearTimeout(b);
  window.location=url;
 }
 
 }
 </script>

我的页面中写的是：

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class tiaozhuan : System.Web.UI.Page
{
    protected ruixiang rx = new ruixiang();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
           Bind();
        }
    }
    /// <summary>
    /// 设置页面跳转
    /// </summary>
    protected void Bind()
    {
        if (Request.Cookies["huiyuan"] != null)
        {
            string ziduan = "huiyuan_name";
            string biao = "jj_huiyuan";
            string where = "huiyuan_jincheng = 0 and huiyuan_user_name ='" + Request.Cookies["huiyuan"]["huiyuan_name"].ToString()+"'";

            Hashtable dr = rx.GetReader(ziduan, biao, where);
            if (dr != null)//一级用户名
            {
                img1.Visible = true;
                Page.RegisterStartupScript("ggg", "<script>aa('../chanpin/cplei_list.aspx');</script>");

            }
            else//二级用户名
            {
                img2.Visible = true;
                Page.RegisterStartupScript("ggg", "<script>aa('../new_lipin/lipin_index.aspx');</script>");
            }
        }
        else
        {
            Response.Write("<script>window.location('../index.aspx');</script>");
        }
    }
}

可是我在火狐浏览器中一直停留在跳转页面跳转不过去

请问是什么问题呢

是我的脚本写的有问题吗

请教高手？？？？