Четные и нечетные стр.

/* What cool parameter names... */
function display_gallery($c, $so, $o, $initialPhoto, $columns, $lines)
{
   /* Prepare the query line */
   $query = 'SELECT * FROM imglib WHERE cat="'.$c.'" ORDER BY '.$so.' '.$o.' LIMIT '.$initialPhoto.', '.($columns*$lines);    

  /* Execute query */
  if(!$result = mysql_query($query))
  {
    echo 'Query failed'
    return();
  }

  /* Add one column for the empty cell */
  $columns++;

  /* Loop over the result to display it */
  $columnIndex = 0;
  while ($row = mysql_fetch_array($result, MYSQL_ASSOC))
  {

    /* Is it a new line? */
    if ($columnIndex % $columns)
    {
       echo '<tr>';
    }    

    /* If first cell of the line, then put an empty cell */
    if (!$columnIndex)
    {
       echo '<td width="540" height="30" colspan="2" class="BoxBellow">

</p></td>';
    }
    /* If not open a cell*/
    else
    {
      if ($columnIndex % 1)
      {
        // odd shows no dotted line
        echo '<td width="270">';
      }
      else
      {
        // even shows a dotted line
        echo '<td width="270" class="Boxright">';            
      }
    }

    /*
      Insert the pics or whatever this function is doing...
      But i guess that somehow, you should use $row['url'] as
      parameter
    */
    itemplaceholder();

    /* Close the cell */
    echo '</td>';

    /* Increment counter */
    $columnIndex = ($columnIndex + 1) % $columns;

    /* Is it end of line? */
    if (!$columnIndex)
    {
       echo '</tr>';
    }    
  }  
 
  /*
    After looping, It is way unsure to assume that
    all line have the same amount of cells. Therefore,
    we are fixing the next line to be good.
    And closing line as well if needed.
  */
   if ($columnIndex)
   {
     echo '<td colspan='.($columns-$columnIndex).'></td></tr>';
   }

}