title: Using JQuery to check if no radio button in a group has been checked
body: <p>I'm sitting with a problem, I need to check with JQuery if no radio button within a radio button group has been checked, so that I can give the users an javascript error if they forgot to check a option. </p>
  
  <p>I'm using the following code to get the values</p>
  
  <pre><code>var radio_button_val = $("input[name='html_elements']:checked").val();
  </code></pre>