Alternating colors in

How can I produce results similar to this: http://www.activefarming.com/hay-directory ?

I have looked in:

* The source code of that page --> no use!
* Sample code from the net such as:

      $rowcolor1 = '#0000FF';
      $rowcolor2 = '#FF0000';
       echo '  
   <table style="caption-side:top; border-collapse:collapse">';  
       for ($n = 0; $n < count(DISTINCT($nid)); $n++)  
       {  
           if($n % 2 == 1)  
           {  
                 $style = $rowcolor1;  
           }else{  
                $style = $rowcolor2;   
           }  
           echo '  
       <tr style="background:'.$style.';">........ etc.
    

and:

      $color1 = '#FF0000';
      $color1 = '#0000FF';
      <? $row_count=0; ?>
      <table>
      <? $row_color = ($row_count % 2) ? 'color1' : 'color2'; ?>
      <tr class="<?=$row_color; ?>"><td>sample</td></tr>
      <? $row_count++; ?>
      </table>
    

* The source code of other modules (e.g. watchdog module) such as:

      $n = count($header);
      for ($i = 0; $i < $n; $i++) {
      $output .= '<tr class="' . ($i % 2 == 0 ? 'even' : 'odd') . '"><th>' . $header[$i] . '</th><td>' . $data[$i] . '</td></tr>';
      }
    

The code works, but the problem is that the node-flexinode-n.tpl.php file is run each every time a new record is brought from the database, which means that each time the variable will take the value of the first color.

Any help is most appreciated.

Mi