<body>
  <table>
  <tr class="nieparzyste">
    <td>komrka1-1</td><td>komrka1-2</td><td>komrka1-3</td>
  </tr>
  <tr class="parzyste">
    <td>komrka2-1</td><td>komrka2-2</td><td>komrka2-3</td>
  </tr>
  <tr class="nieparzyste">
    <td>komrka3-1</td><td>komrka3-2</td><td>komrka3-3</td>
  </tr>
  <tr class="parzyste">
    <td>komrka4-1</td><td>komrka4-2</td><td>komrka4-3</td>
  </tr>
  <tr class="nieparzyste">
    <td>komrka5-1</td><td>komrka5-2</td><td>komrka5-3</td>
  </tr>
  </table>
</body>