title: how to fix opacity on IE6
body: <p>how to fix opacity on IE6</p>
  
  <p>This code does not work on IE6 !</p>
  
  <pre><code>filter:alpha(opacity=50);
  -moz-opacity:0.5;
  -khtml-opacity: 0.5;
  opacity: 0.5;
  </code></pre>
  
  <p>And this code !</p>
  
  <pre><code>$('#description').animate({opacity: 0.0}, 1000);
  </code></pre>