框加中 退出 按钮的使用

 FormsAuthentication.SignOut();
        StringBuilder Script = new StringBuilder();
        Script.Append(@"
                 <script language='javascript' type='text/javascript'>
                  top.opener=null;
                  parent.opener=null;
                  parent.close();
                  top.window.close();
                  top.open('http://localhost:7080/shareNews/Default.aspx');
                  </script>
            ");
        ClientScriptManager cs = Page.ClientScript;
        cs.RegisterStartupScript(GetType(), "Script", Script.ToString());