Alternating rows instead of columns

[nuno]

Originally posted by fastforward
/

/ START ALTERNATING ROW COLOR HACK
         if ($whatcol==0) {
                $whatcol=1;
                $rowcolor='#F1F1F1';
         } else {
                $whatcol=0;
                $rowcolor='#DFDFDF';
         }
// END ALTERNATING ROW COLOR HACK

This code needs to be place within the 'while loop' that starts with

 while ($thread=$DB_site->fetch_array($threads) and $counter++<$perpage) {

how do i make this code to work with WOL?
TIA

[nuno]

*bump*