title: Is there a workaround to make CSS classes with names that start with numbers valid?
body: <p>Is it referenced anywhere that CSS classes with names start with numbers doesn't work?
  for example I found that a class with background like:</p>
  
  <pre><code>.000000-8 {background:url(../../images/common/000000-0.8.png);}
  .8FFFFFF {background:url(../../images/common/FFFFFF-0.8.png);}
  </code></pre>
  
  <p>doesn't work in most browsers I have and the <a href="http://www.w3.org/TR/CSS21/grammar.html#scanner">CSS grammar</a> shows that but my question is there a <strong>workaround</strong> to make CSS classes with names that start with numbers valid? .</p>