I have a table with checkboxes and I want to do the check all and un-check all checkboxes but I could not find the way to check all the checkboxes.

Here is my code:

<form>

    <?php foreach ($this->entries as $entry): ?>

        <tr class=table_head_seperator>

            <td class=grid_info width=32px bgcolor=#f6f6f6><input type=checkbox class=chk_boxes1 name=to_delete[<?PHP echo $entry['id'] ?>]  /></td>

            <td class=grid_info width=160px bgcolor=#eeeeee><span class=country_name><?php echo $entry['user_name'] ?></span></td>

            <td class=grid_info width=130px bgcolor=#eeeeee><span class=country_name><?php echo $entry['date_created'] ?></span></td>

            <td class=grid_info width=100px bgcolor=#f6f6f6><span class=country_name><?php echo $entry['user_type_name'] ?></span></td>

        </tr>

    <?PHP endforeach; ?>



    <input type=checkbox class=chk_boxes label=check all  />check all

    <input type=checkbox class=unchk_boxes   /> un-check all

</form>

<script type=text/javascript>

    $(document).ready(function() {

        $('.chk_boxes').click(function(){

            $('.chk_boxes1').attr('checked',checked)

        })

    });

</script>