title: GXT Grid export to excel file
body: <p>I am using GXT.
  I have a Grid.</p>
  
  <pre><code>com.sencha.gxt.widget.core.client.grid.Grid&lt;RiaBean&gt;  grid;
  </code></pre>
  
  <p>I want to export this to excel file.</p>
  
  <p>i dont want to use external Jar files.</p>
  
  <p>Can any body Help.</p>