Постраничный вывод текста

if(CModule::IncludeModule("iblock")) 
{
  $myrow = CIBlockSection::GetByID($id)->GetNext();

   $count_str = 2000;
   $count_page = ceil(strlen($myrow['DESCRIPTION'])/$count_str)-1;
   echo "<table>";
   if (strlen($myrow['DESCRIPTION']) > $count_str)
   {
      if(!$_GET['str'])
      {
         echo "
         <tr><td>".substr($myrow['DESCRIPTION'], 0, $count_str)."...</td></tr>";
         echo '<tr><td><a href="?id='.$id.'&str=1">Далее »</a></td></tr>';
      }
      else
      {
         echo "
                     продолжение
         <tr><td>".substr($myrow['DESCRIPTION'], $count_str*$_GET['str'], $count_str)."</td></tr>";
         echo '<tr><td align=center><a href="?id='.$id.'&str='.($_GET['str']-1).'">Назад</a>';
         if ($_GET['str'] != $count_page)
         echo ' | <a href="?id='.$id.'&str='.($_GET['str']+1).'">Далее</a></td></tr>';
      }
   }
   else 
   {
      echo "
      <tr><td>$myrow[DESCRIPTION]</td></tr>";
   }
   echo "</table>";
   
}