How to do live updates on page
<p>I have a page where users can signup to participate in a game match. A user just fills out a text field with a username and clicks a submit button.</p>

<p>Now, I can add their username to a table that shows all signed up users via ajax when they click submit.However, I'd like to have that table update without a page refresh every time a new user is added.</p>

<p>Is the only way to do this by setting some kind of interval that updates that table? It seems like it'd be making a lot of un-needed database calls. What's a good interval to use?</p>

<p>Should I store the table in a view and use .load to insert it into a div on the page every say, 10 seconds?</p>
