title: How get the zk element id from js
body: <p>I am working with ZK and I want to get the id of the a zk element from js.
  I have used differents ways:</p>
  
  <p>Declaring the component like native html and it gets the id from js but it isn't correct.
  I have declared the element using the html tags of ZK but isn't correct too.
  I have seen some functions like Component.getFellow('component_name') and finally I have read about the UUID and use some example codes but I can't the element id for example:</p>
  
  <pre><code>&lt;label id=titleBook/&gt;
  </code></pre>
  
  <p>from javaScript.</p>
  
  <p>any idea?
  Thank you.</p>