Posted by carrion on 05/24/07 06:57

On May 22, 11:10 am, shankhar <shankha...@gmail.com> wrote:
> Hi all,
>
> In my project there is a requirement. If a user logged in at a time
> since he/she logged out others are not allowed to loggin using the
> same user name. That is to avoid multiple logins using a account. How
> to do this?
>
> I had got a idea and implemented.
>
> 1. When a user logs in storing the username, ip, login time to db.
> 2. When a User logs in i'll check the table whether the username
> exists in the table or not if yes i'll not allow the user to login
> else i'll allow to loggin.
> 3. When he logs out i'll delete the record from the table. Then he/
> she can login again.
>
> But there is a problem in this the user can close the browser directly
> or right click in the taskbar and close it or by pressing Alt + F4. So
> for this i have to catch the things in Javascript and trigger the
> logout.
>
> Is is possible to catch the events in Javascript, if yes please
> provide me.
>
> Or Is there any other method to restrict multiple login using single
> account.
>
> Thanx in advance.
>
> Shankhar

There's the DOM event document.onunload.
Maybe you could use it to send an ajax request that terminates the
session.
But it don't really know how reliable this would be.

Good luck

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