title: jQuery Validation Plugin: validate decimal number with comma as decimal separator
body: <p>HTML:</p>
  <pre><code>&lt;form id=&quot;myform&quot;&gt;
      &lt;label for=&quot;field&quot;&gt;Required, decimal number:&lt;/label&gt;
      &lt;input class=&quot;left&quot; id=&quot;field&quot; name=&quot;field&quot;&gt;
      &lt;br/&gt;
      &lt;input type=&quot;submit&quot; value=&quot;Validate!&quot;&gt;
  </code></pre>