title: jQuery validation check single element
body: <p>I want to validate an element with jQuery validation. How should I do that? My element conditions are: its length is more than 5 and it is a required field.</p>
  
  <p>My element code:</p>
  
  <pre><code>&lt;input type="password" name="password_field" /&gt; 
  </code></pre>
  
  <p>I don't expect <code>$('form).validation()</code> method. I want to validate that method without having form selector.</p>