adding class to html table row

[eluser]intsurfer[/eluser]
Hi!
I've changed the Table.php library to set class for rows. I googled how to do it, but i decided to make some changes in the library file.
This is code from my project:

Code:

foreach($res as $item){
//......
$this->table->add_row($item['price'],$celldb,$cellde, $cell1);
$this->table->add_row_class($item['center_id'].'_'.$item['spec_id']);
}

result is:

Code:

<tbody>
<tr class="6_1">
<td>100.00</td><td>01.01.2012</td><td>00.00.0000</td></tr>
<tr class="2_4">
<td>150.00</td><td>01.04.2012</td><td>00.00.0000</td></tr>
</tbody>

File is here