title: Set selected radio from radio group with a value
body: <p>Why am I struggling with this?</p>
  
  <p>I have a value: 5</p>
  
  <p>How do I check the radio button of group "mygroup" with the value of 5?</p>
  
  <pre><code>$("input[name=mygroup]").val(5); // doesn't work?
  </code></pre>