title: How to catch onload event on css styles?
body: <p>I load css</p>
  
  <pre><code>var ss = document.createElement("link");
  var url = 'http://site.ru/style.css';
  ss.setAttribute("rel", "stylesheet");
  ss.setAttribute("type", "text/css");
  ss.setAttribute("href", url);
  document.getElementsByTagName("head")[0].appendChild(ss);
  </code></pre>
  
  <p>I want to call function after css loading, but tag link hasn't onload event, is there a way to do it? </p>