In this article we will discuss to select all td elements using tag name jQuery Element Selector.  We are changing their background color of table row by selects the tr elements on the page.

<script src="//code.jquery.com/jquery-1.10.2.js"></script>
    <script type="text/javascript">
       $(document).ready(function () {
            $('tr').css('background-Color', 'yellow');
        });
    </script>
<body>
    <div>
       <table>
                <thead>
                   <tr>
                       <th>ID
                       </th>
                       <th>City
                       </th>
                       <th>Country
                       </th>
                       <th>Continent
                       </th>
                   </tr>
                </thead>
                <tbody>
                   <tr>
                       <td>1</td>
                       <td>Montería</td>
                       <td>Colombia</td>
                       <td>South America</td>
                   </tr>
                   <tr>
                       <td>2</td>
                       <td>Birmingham</td>
                       <td>United Kingdom</td>
                       <td>Europe</td>
                   </tr>
                  <tr>
                       <td>3</td>
                       <td>Bangalore</td>
                       <td>India</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>4</td>
                       <td>Tokyo</td>
                       <td>Japan</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>5</td>
                       <td>Kuala Lumpur</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>6</td>
                        <td>Rio de Janeiro</td>
                       <td>Brazil</td>
                       <td>South America</td>
                   </tr>
                   <tr>
                       <td>7</td>
                       <td>Ipoh</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>8</td>
                       <td>Tawau</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>9</td>
                       <td>Hiroshima</td>
                       <td>Japan</td>
                       <td>Asia</td>
                    </tr>                
                </tbody>
            </table>
    </div>
</body>
</html>

Output:

Below example show how to apply changes to the background color of rows of the table alternately.

<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script type="text/javascript">
       $(document).ready(function () {
            $('tr:even').css('background-Color', '#2CB387');
            $('tr:odd').css('background-Color', '#E91E63');
        });
    </script>
<body>
    <div>
       <table>
                <thead>
                   <tr>
                       <th>ID
                       </th>
                       <th>City
                        </th>
                       <th>Country
                       </th>
                      <th>Continent
                       </th>
                   </tr>
                </thead>
                <tbody>
                   <tr>
                       <td>1</td>
                       <td>Montería</td>
                       <td>Colombia</td>
                       <td>South America</td>
                   </tr>
                   <tr>
                       <td>2</td>
                       <td>Birmingham</td>
                       <td>United Kingdom</td>
                       <td>Europe</td>
                   </tr>
                   <tr>
                       <td>3</td>
                       <td>Bangalore</td>
                       <td>India</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>4</td>
                       <td>Tokyo</td>
                       <td>Japan</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>5</td>
                       <td>Kuala Lumpur</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                    </tr>
                   <tr>
                       <td>6</td>
                       <td>Rio de Janeiro</td>
                       <td>Brazil</td>
                       <td>South America</td>
                   </tr>
                   <tr>
                       <td>7</td>
                       <td>Ipoh</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>8</td>
                       <td>Tawau</td>
                       <td>Malaysia</td>
                       <td>Asia</td>
                   </tr>
                   <tr>
                       <td>9</td>
                       <td>Hiroshima</td>
                       <td>Japan</td>
                       <td>Asia</td>
                   </tr>
                 
                </tbody>
            </table>
    </div>
</body> 

Output: