title: How to implement renderTo on the fly
body: <p>I have this simple code, in which I iterate through a form fields:</p>
  
  <pre><code>frm.getFields().each(function(field) {
      ....
  });
  </code></pre>
  
  <p>What I want to achieve is to render some fields to some html elements (in case some condition is met - which in fact does not matter). So, I want to implement something like:</p>
  
  <pre><code>frm.getFields().each(function(field) {
      if(ok){
          field.renderTo(document.getElementById(some_id));
      }
  });
  </code></pre>
  
  <p>I know how it statically works, just like:</p>
  
  <pre><code>Ext.create(..., function(){
      renderTo:...
  });
  </code></pre>
  
  <p>But I want to do this dynamically, like I said above.</p>