title: jQuery - Do only once
body: <p>I want to check if an element has the class .active, if it does add: margin-top: 4px;</p>
  
  <p>However I only want this to occur <strong>once</strong>, when the page loads, once the class has been detected I don't want to detect it again and add the CSS style.</p>
  
  <p>This class is applied when certain elements are hovered over.</p>
  
  <p>Is this possible in jQuery?</p>