title: sorting Datagrid to highlight rows
body: <p>I currently have an advanced Datagrid which I have customised to highlight rows based on a conditional statement. I need to now sort the datagrid based of a specified column and then highlight the top 20%. so far I can get the row index and change the row color but need to find a way to highlight the top 20% of the ints in the column named "COLUMN_1"</p>
  
  <pre><code>if(data.getItemAt(dataIndex)){
      var row:Object = data.getItemAt(dataIndex);
  
  if(//conditional statement needed)
        {
  
   color=(dataIndex%2==0)?0xff0033:0x880000;
        }
  </code></pre>