title: ExtJs - Destroy and render component
body: <p>I'm trying to destroy and render a grid and doesn't work...</p>
  
  <pre><code>var gridCategory = new Ext.grid.GridPanel(...);
  </code></pre>
  
  <p>I just fire a button called 'Render grid'...</p>
  
  <pre><code>gridCategory.render('gridArea');
  </code></pre>
  
  <p>and gridCategory.rendered becomes True</p>
  
  <p>so I have a button called 'Destroy grid'</p>
  
  <pre><code>gridCategory.destroy();
  </code></pre>
  
  <p>and gridCategory.rendered keeps True</p>
  
  <p>and I tried to render again</p>
  
  <pre><code>gridCategory.render('gridArea');
  </code></pre>
  
  <p>and it fail, doesn't render</p>
  
  <p>what am I doin' wrong? please help</p>