title: a simple problem about RegExp in Javascript
body: <p>I have a text:</p>
  
  <pre><code> &lt;font class="myclass"&gt;class abc&lt;/font&gt; 
  </code></pre>
  
  <p>and i have a pattern: class
  now, i want to find the word "class" before "abc" but not in the  <code>&lt;font class="myclass"&gt;</code> ,how could i do with RegExp in javascript?
  Thanks! :)</p>