title: How to select multiple rows by using grid.getSelectionModel().select(Indexes) in extjs 4.1
body: <p>I want to select multiple rows by using grid.getSelectionModel().select(Indexes) in extjs 4.1
     Anyone knows how to do it?? 
     Here is my code:</p>
  
  <pre><code>var grid = Ext.getCmp('GridStudents');
  var fieldvalues = '2054,2055,2057';
  var arr = fieldvalues.split(',');
  
  for (var j = 0; j &lt; arr.length; j++) 
  {
    index = grid.store.find('StudentID', arr[j]);
    grid.getSelectionModel().select(j);
  }
  </code></pre>