一段ＪＳ就搞定：
在登录页面中添加ＪＳ <script type="text/javascript">if (top.location != self.location) top.location=self.location;</script>
在登录页面中添加ＪＳ
<script type="text/javascript">if (top.location != self.location) top.location=self.location;</script>
