Hover effect table cells

Hover effect table cells

hi,
i am a beginner in jquery and now a have a question.

i have a table like this:
<table border="0">
    <tbody>
        <tr class="head">
            <td class="text">Headline 1</td>
            <td class="text">Headline 2</td>
            <td class="text">Headline 3</td>
            <td class="text">Headline 4</td>
        </tr>
        <tr class="raw_one">
            <td class="text">Selection1</td>
            <td class="pink">A 1</td>
            <td class="orange">A 2</td>
            <td class="grey">A 3</td>
        </tr>
        <tr class="raw_two">
            <td class="text">Selection2</td>
            <td class="pink">B 1</td>
            <td class="orange">B 2</td>
            <td class="grey">B 3</td>
        </tr>
        <tr class="raw_three">
            <td class="text">Selection3</td>
            <td class="pink">C 1</td>
            <td class="orange">C 2</td>
            <td class="grey">C 3</td>
        </tr>
    </tbody>
</table>

Now when i hover the cell with B2 i want that the class of the cell Selection2 and the cell Headline 3 changed.

My solution is that:
$('tr').hover(function(){
 $(this).find('td.text').addClass('bold');
 }, function(){
 $(this).find('td').removeClass('bold');
});

but that works only for the first part but not with the headlines.

Can anybody help me?