Flash Message - jQuery
<p>In my Rails application I have flash messages and I would like it so that each time there is a flash message, it scrolls down from the top (all the content goes lower) stays for a few seconds and the slides back up.</p>

<p>How can I do this with jQuery?</p>

<p>Do I toggle the height?</p>

<h3>Update</h3>

<p>Sometimes the message will be injected into the HTML which means that the <code>slideDown</code> won't work since the DOM has already loaded, how can I have it so jQuery looks for <code>.message</code> and then applies the <code>slideDown</code> and <code>slideUp</code>?</p>
