title: CSS Opacity Properties?
body: <p>Do I really need all these CSS Opacity Properties? I'm not using ALL of these at once, but showing them at different percentages.  But I usually have the group of 4 and I wanted to see if I can eliminate anything from my stylesheet.</p>
  
  <p>And can someone show me an example of 100%, 25%, and 0%? I want to make sure I have them done correctly.</p>
  
  <pre><code>opacity: 1;
  -moz-opacity: 1;
  filter:alpha(opacity=1);
  -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=100)";
  
  
  opacity: 0.25;
  -moz-opacity: 0.25;
  filter:alpha(opacity=0.25);
  -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=25)";
  
  
  opacity: 0;
  -moz-opacity: 0;
  filter:alpha(opacity=0);
  -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
  }
  </code></pre>