title: Jquery radio button focus not work
body: <p>Hello everyone I'm doing some custom radio buttons styles and the css :focus do not work. So I'm figuring out some js solutions and right now I have this:</p>
  
  <pre><code>// Focuse radio btn
    function focus() {
     $('.radio, .field-label').focusin(function(e) {
     //console.log(e.target);
     $(e.target).parent().animate({opacity: .5},400);
  });
  
  $('.radio, .field-label').focusout(function(e) {
    //console.log('focus out!');
    $('.radio, .field-label').parent().animate({opacity: 1},1000);
  });
  }
  
  focus(); 
  </code></pre>
  
  <p>This is working on Chrome. But in the other browser like safari or mozilla it doesn't work. Why? Any solutions?
  Thanks!</p>