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private void btnLogin_Click(object sender, System.Web.UI.ImageClickEventArgs e)
    {
        Staff sf = GetUser(txtUserName.Text, txtPassword.Text);
        if (sf != null)
        {
            if (sf.IsDisable + "" == "1")
            {
                FormsAuthentication.SignOut();
                lblMsg.Text = "用户名已被禁用！";
                lblMsg.Visible = true;
            }
            else
            {
                //HttpContext.Current.User.Identity.Name = Staff.ID;
                //---------start------ by wj 2006-1-20
                Boolean isRole;
                isRole = (new UserMenu()).getModuleRight(sf, "SY_SYDATA");
                if (isRole)
                {                                         
                    //我想在这里指向我想要的页面  但是不成功  请帮忙看看？？？？？？？？
                    Response.Redirect("BD/Measure/PDAZY/default.aspx");
                   
                    
                }
                else
                {
                   
                    FormsAuthentication.SignOut();
                    lblMsg.Text = "没有访问该模块的权限！请到‘用户管理’维护";
                    
                    lblMsg.Visible = true;
                    
                }
                //---------end------by wj 2006-1-20  
                
            }
        }
        else
        {
            FormsAuthentication.SignOut();
            lblMsg.Text = "用户名或密码不对！";
            lblMsg.Visible = true;
        }
    }