title: Server Sent Events Stop Start with new parameter
body: <p>please help.</p>
  
  <p>I'm using Server Sent Events to dynamically update a website based on data stored in a database.</p>
  
  <p>I now wish to pass a new parameter ('abc.php/?lastID=xxx') back to the PHP script based on data received in the previous message.</p>
  
  <p>I understand i can use <code>event.close</code> to stop the current 'stream' but im struggling to work out how to use the same <code>'EventListener'</code> for each new EventSource where the URL is dynamically created</p>
  
  <p>Can somebody point me in the right direction please?</p>
  
  <p>Thanks,</p>