print("<table border=1>");
$hourtoprint = 8;
while ($line = mysql_fetch_array($query, MYSQL_ASSOC)) {
   while ($hourtoprint < $line["ReqTimeen"]) {
      print("<tr><td>" . $hourtoprint . " - " . ($hourtoprint + 1) . "</td><td width=300>&nbsp;</td></tr>");   
      $hourtoprint++;
   }

   for ($hour = $line["ReqTimeen"];    $hour <= $line["ReqTimelh"]-1;   $hour++) {
      if ($hour == $line["ReqTimeen"]) {
         print("<tr>");
         print("   <td>" . $hour . " - " . ($hour + 1) . "</td>");
         print("   <td rowspan=" . ($line["ReqTimelh"] - $line["ReqTimeen"]) . "><a href='tralala.php'>" . $line["ReqDescr"] . "</a></td>");
         print("</tr>");
      }
      else {
         print("<tr>");
         print("   <td>" . $hour . " - " . ($hour + 1) . "</td>");
         print("</tr>");
      }
      $hourtoprint++;
   }
}

while ($hourtoprint <= 21) {
   print("<tr><td>" . $hourtoprint . " - " . ($hourtoprint + 1) . "</td><td width=300>&nbsp;</td></tr>");   
   $hourtoprint++;
} 

print("</table>");