问一个比较难的注销问题？
说明：
userState（1为未登陆，２为登陆)，
一个login.php的页面,登陆成功后(保存COOKIE或SESSION),修改数据库里的userState(用户状态) = 2.如果用户点注销后(清空COOKIE或SESSION)，再修改数据库里的userState = 1
问：当这个用户不点注销而是直接关闭页面，请问这个userState怎么修改为1？
------解决方案--------------------
------解决方案--------------------
不是好办法,万一死机什么的呢?最好的办法的判断多久没动作的,然后userState = 1
------解决方案--------------------
session 有个生命周期和浏览器挂钩,检查你的session_id/cookie是否存在/过期,不存在就调用注销程序
------解决方案--------------------
不行,好象没什么好方法,关掉浏览器了就没什么操作了.
服务器端是可以知道用户的当前状态的,是否只能在服务器端定时刷新....
JAVASCRIPT似乎也是可以的
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