title: boolean argument not passing correctly
body: <p>I'm new to jQuery and im just trying to pass a boolean to a function.Ive tried various amendments but still not working ?</p>
  
  <p>I'm expecting the alert to be fired</p>
  
  <pre><code>isTrue(true);
  
  function isTrue(boolean isNot){
      if(isNot){
        alert('true');
      }
  }
  </code></pre>