Is there a way to send a message from the server to client when an event happens?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1425048/implementing-server-push">Implementing Server Push</a>  </p>
</blockquote>



<p>I want to send a message to the client from php to javascript when some event happens at the server side like for instance the user table is modified or something like this. When the event occurs, the server sends it to the client..How can I implement this ?</p>

<p>If possible without using html5</p>
