title: count of selected radio buttons in jquery
body: <p>suppose I have groups of radio buttons like so: </p>
  
  <pre><code>&lt;label&gt;&lt;input type="radio" value="1" name="rdQueen" /&gt; Scaramouche&lt;/label&gt; &lt;br /&gt;
  &lt;label&gt;&lt;input type="radio" value="1" name="rdQueen" /&gt; Will you do the&lt;/label&gt; &lt;br /&gt;
  &lt;label&gt;&lt;input type="radio" value="1" name="rdQueen" /&gt; Fandango&lt;/label&gt; &lt;br /&gt;
  </code></pre>
  
  <p>... sometime later in the page ...</p>
  
  <pre><code>&lt;label&gt;&lt;input type="radio" value="1" name="rdFruit" /&gt; Mango&lt;/label&gt; &lt;br /&gt;
  &lt;label&gt;&lt;input type="radio" value="1" name="rdFruit" /&gt; Kiwi&lt;/label&gt; &lt;br /&gt;
  &lt;label&gt;&lt;input type="radio" value="1" name="rdFruit" /&gt; Potato&lt;/label&gt; &lt;br /&gt;
  </code></pre>
  
  <p>All I want to do is make sure atleast one of them from both group has been selected.. so I need to count the radiobuttons that have been checked, in this case it'll be 2.</p>
  
  <p>Only, I am not sure how to do that. help please!</p>