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Hi Experts,    
I am very thank full if you help me.     I have developed
one web application which can contain many users.    
I just want to prevent multi ple login in web application in terms of like -
          1.  If
is logged In, form another browser or another machine the
not login untill previous login has been distroyed.
          2. If User1
Logged Out
from Browser "a" or Machine "a", from another machine or
browser User1 can login.          
3. If Browser closed with Logout, User1 can login again from same browser or
browser or machine.          
4. And The most important
is, Suppose Application, Machine Or b

close unexpectedly
, The into system.

Can u Help me? Thanks in advance.
Mahesh Patel.

Updated 17-Nov-10 18:47pm
Mohd Wasif 17-Nov-10 23:53pm    
Clarify ur question.

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use data base.there u make table with u_name pass and status value...

if user1 has entered into page then update the status check the condition in the table using queries if any user status is online then terminate the user..
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