This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
I HAVE MAKE LOGIN MODULE.I HAVE CHECK MULTIPLE LOGIN PREVENT USING HASH TABLE AND REMOVE THE ENTRY FROM HASH TABLE WHEN USER LOGOUT.BUT PROBLEM IS THAT WHEN USER CLOSE WINDOW WITHOUT LOGOUT THAN HOW I WILL REMOVE ENTRY OF HASH TABLE.IS ANY LISTERNER GIVE ME INFORMATION OR ANOTHER METHOD???