title: Signalr check if hub already started
body: <p>I have multiple javascript blocks with signalR functions.</p>
  
  <p>I don't know the order of execution so that i want to start the hub with</p>
  
  <p><code>$.connection.hub.start();</code> </p>
  
  <p>if it isn't started already.</p>
  
  <p>How can i check if the hub is already started? Starting it multiple times it it throws an error.</p>