Posted by Jerry Stuckle on 05/22/07 10:13

shankhar 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 no way to tell if the user closed his browser. Or turned off
his computer, unplugged from his network or any of a number of things.

You can use a short timeout, i.e. 15 minutes, and if they don't do
something in that time period their session gets deleted.

But one of the ones I like best is if one person logs on while another
one is using that account, the first one is logged out automatically.
It gets to be very annoying - and they soon stop sharing their account
info with others.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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