Form empty input
<p>I'm using the <a href="http://flowplayer.org/tools/" rel="nofollow">jQuery TOOLS - The missing UI library</a>.
For tooltip on all input fields I do</p>

<pre><code>      $("#univers :input").tooltip({
   effect: 'slide',
   position: "center right",
   offset: [-2, 10],
   effect: "fade",
   opacity: 0.5,
   tip: '.tooltip'
  });
</code></pre>

<p>But I would like to show tooltip <strong>only if input field is empty</strong>. So I did</p>

<pre><code>          $("#univers input:text[value=""]").tooltip({
   effect: 'slide',
   position: "center right",
   offset: [-2, 10],
   effect: "fade",
   opacity: 0.5,
   tip: '.tooltip'
  });
</code></pre>

<p>But this one doesn't work !</p>

<p>Any idea ?</p>
