例：===========Logout.aspx 页============================
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language='javascript' type='text/javascript'>
var secs =5; //倒计时的秒数
var URL;
function Load(url) {
URL = url;
for(var i=secs;i>=0;i--)
{
window.setTimeout('doUpdate(' + i + ')', (secs-i) * 1000);
}
}
function doUpdate(num)
{
document.getElementById('msg').innerHTML = '您已经退出登录，将在' + num + '秒后返回';
if(num == 0) { window.location=URL; }
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div id="msg" style="margin:20px auto;"></div>
<script language='javascript' type='text/javascript'>
Load("<% = GetReturnUrl() %>");
<!---这里调用的asp.net方法，也可以在这里直接写出url地址-->
</script>
</form>
</body>
</html>
===========Logout.aspx.cs 页============================
protected void Page_Load(object sender, EventArgs e)
{
Session.Clear();
Session.RemoveAll();
System.Web.Security.FormsAuthentication.SignOut();
}
protected string GetReturnUrl()
{
if (string.IsNullOrEmpty(Request.QueryString["ReturnUrl"]))
{
return "/";
}
else
{
return Request.QueryString["ReturnUrl"];
}
}