title: How to deal with session timeouts in AJAX requests
body: <p>I'm sure you're all familiar with the voting systems that use AJAX (Um... look right over there &lt;----)</p>
  
  <p>I have something similar and when you vote up or down it uses AJAX to request the new value from votes.php. The problem is that I am using a session to get the userid so a person can only vote once. What happens if they sit on the page for an hour and then vote so the session is no longer there? What would be a good way of handling this situation? Should I redirect their page to the login screen? If so, how can I do that from the votes.php page that is being referenced by the AJAX request? Am I overlooking a good way of handling this situation? Any advice would be helpful.</p>