title: How to click with jQuery in ZK
body: <p>I have to use Selenium to test a website and I have to click on the button. But because it is ZK, I am using jQuery to do all actions, but the problem is that I can't click on the button.
  Also I need to check a checkbox, but nothing is working with jQuery. Maybe you have any ideas how to click with jQuery in ZK and how to check a checkbox?</p>
  
  <p>For example something like: </p>
  
  <pre><code>jq('.z-button-os:eq(0)').click()
  </code></pre>
  
  <p>is not working.</p>
  
  <p>Thank you!</p>