title: ruby on rails flash messages - :alert :error :notice and :success?
body: <p>In several of my controllers, I have redirects/flash messages</p>
  
  <pre><code>redirect_to products_url, :notice =&gt; "message here", 
  redirect_to states_url, :error =&gt; "oops!" etc... 
  </code></pre>
  
  <p>In my sessions controller, however, upon successful authentication, I have 
      flash[:success] = "welcome!"
      redirect_to user</p>
  
  <p>I'd like to be able in my other controllers to do something like
      :success => "yay!"</p>
  
  <p>This is mostly for cosmetic/consistency purposes, but are :notice, :alert and :error the only flash-types available / can I add additional types?  Am I making sense?</p>
  
  <p>Thanks!</p>