title: jQuery get specific class name
body: <p>I have a div with few classes in no specific order. </p>
  
  <pre><code>&lt;div class="whatever styledark myclass"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I'm interested in the styledark class. This can be styledark, stylewhite, stylered.... I want to get this class name no matter what color comes after the word style.  The question is, when i click on the div, how i do i alert this class name that start with the word style disregarding other classes in the div. The classes are in no specific order.  </p>