title: Adding click event to radio boxes Ext.form.Radio in Ext JS
body: <p>I have a simple radio button:</p>
  
  <pre><code>new Ext.form.Radio({
                      id: 'ptype',
                      boxLabel:'Yes',
                      name: 'price_type',
                      value: 1
                  })
  </code></pre>
  
  <p>However Im having trouble adding a on click event ot it.
  I usually use:</p>
  
  <pre><code>listeners: {
                  click: function (a,e) {
                      //event
                  }
  }
  </code></pre>
  
  <p>As a config parameter, however it does not seem to work in this case.</p>
  
  <p>Any advice appreciated, thanks.</p>