title: new Regexp doesn't work
body: <p>I'm trying to convert following expression to "new Regexp()" style:</p>
  
  <p><a href="http://jsfiddle.net/HDWBZ/" rel="noreferrer">http://jsfiddle.net/HDWBZ/</a></p>
  
  <pre><code>var Wyrazenie = /\btest[a-z]*/g;
  </code></pre>
  
  <p>I'm really confused with it and have no idea how to fix it. Below is what I've done but obviously it doesn't work.</p>
  
  <pre><code>var Wyraznie = new RegExp("\btest[a-z]*","g");
  </code></pre>
  
  <p>Also have a question how would it look if instead of "test" I would use variable?</p>