session 超时的问题

Question

asp.net里  session超时后跳到登录页。 但我用的框架 左边是菜单右边是主体 跳到登录页时只有右半部分跳到了登录页 但左边的菜单却还有，这个问题怎么解决啊？
session失效后跳到登录页成了这摸样，如图：---------------------------------------------------------------------------
|               |                                                          |
|               |                                                          |
|     菜        |                                                          |
|               |                                                          |
|               |               -------------------------                  |
|     单        |                                                          |
|               |                                                          |
|               |                    登录                                  |
|               |                                                          |
|               |                                                          |
|               |               -------------------------                  |
|               |                                                          |
|               |                                                          |
|               |                                                          |
---------------------------------------------------------------------------
怎么使跳到登录页时不显示左边的菜单啊？？？？

Answer 1

js 
parent.location.href="login.aspx"

Answer 2

js 
parent.location.href="login.aspx"

Answer 3

在登陆页面加个js：
<script language="JavaScript">

if(top.location!=self.location)
{
top.location.replace(self.location);
}
}

Answer 4

 if (Session("AdIn_Username") == "")
            Response.Write("<script>window.parent.location='default.aspx'</script>");