title: What does an asterisk before an equal sign mean (*=) ? What about the exclamation mark?
body: <p>I found these notations in a css :</p>
  
  <pre><code>.nav li ul li a [class*="icol-"] { opacity: 0.5; filter: alpha(opacity=50); padding-top: 4px; }
  
  .secNav .chzn-container { width: 100%!important; max-width: 100%; }
  </code></pre>
  
  <p>What does the meaning of the <code>*</code> before the <code>=</code> sign ? Is it a comment when using the <code>!</code> symbol ?</p>