title: window.open(url, '_blank') open two window from backend
body: <p>I have made this code in backend JSF </p>
  
  <pre><code> public void goToURL(String url) {
          RequestContext.getCurrentInstance().execute("window.open(' " + url + "', '_blank').focus()");
      }
  
  &lt;f:actionListener  binding="#{bean.goToURL('/myPage.xhtml')}"/&gt;
  </code></pre>
  
  <p>but whene i call it from my page xhtml, it oppned two tab after one click</p>