Session 注销

<%@ Import Namespace="System.Web.Security " %>

  <script language="C#" runat=server>
    void Signout_Click(Object sender, EventArgs E) {

      FormsAuthentication.SignOut();
      Response.Redirect("login.aspx");
    }

  </script>

若在框架中，则如下：

<%@ Page Language="C#" ContentType="text/html" ResponseEncoding="gb2312" %>
<%@ Import Namespace="System.Web.Security " %>
<%
     FormsAuthentication.SignOut();
%>

<script language="javascript">
     top.location.href="login.aspx";
</script>