HTML Table

HTML

<table id="codexpl">
    <tr>
        <th>#</th>
        <th>Coluna</th>
        <th>Relative</th>
        <th>Isso</th>
    </tr>
    <tr>
        <td>1</td>
        <td>This</td>
        <td>Column</td>
        <td>Is</td>
    </tr>
    <tr>
        <td>2</td>
        <td>Coloumn</td>
        <td>two</td>
        <td>this</td>
    </tr>
    <tr>
        <td>3</td>
        <td>is</td>
        <td>not equals</td>
        <td>a</td>
    </tr>
    <tr>
        <td>4</td>
        <td>the</td>
        <td>Column</td>
        <td>real</td>
    </tr>
    <tr>
        <td>5</td>
        <td>first</td>
        <td>One</td>
        <td>Coloumn</td>
    </tr>
</table>

CSS

#codexpl th, #codexpl td {
    padding:0.8em;
    border: 1px solid;
}
#codexpl th {
    font-weight:bold;
}
.marcada {
    background-color:#fcc;
}

JavaScript

$('#codexpl').on('click', 'tr', function () {
    $(this).siblings().removeClass('marcada');
    $(this).toggleClass('marcada');
});