title: jQuery placeholder that shows the placeholder until text is typed
body: <p>notice how the placeholder works on the Stackoverflow ask a question title and on Twitter's Sign Up form: <a href="https://twitter.com/signup" rel="nofollow">https://twitter.com/signup</a></p>
  
  <p>The placeholder has two states:</p>
  
  <ol>
  <li>No selected (placeholder shown)</li>
  <li>Selected, but 0 input (placeholder shown, lighter color)</li>
  </ol>
  
  <p>Does anyone know of a jQuery plugin that supports this? I've seen jQuery placeholder plugins that support #1, but not #2.</p>
  
  <p>Thanks</p>