title: jQuery addClass to label if radio button checked
body: <p>I am unable to add class in label for radio button list, below is html code:</p>
  
  <pre><code>&lt;div class="custom-radio"&gt;
   &lt;input id="MainContent_rblUserType_2" type="radio" checked="checked" value="3" name="MainContent$rblUserType"&gt;
   &lt;label class="" for="MainContent_rblUserType_2"&gt;I am buyer&lt;/label&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>And Jquery that I am trying to add class in label is :</p>
  
  <pre><code>$(document).ready(function() {
  if($("input.check").is(":checked")){
          $(this).label.addClass("checked");
  }
  });
  </code></pre>