Hi everyone. I have some table structure:

    <tr class="row-2"><tr>
    <tr class="row-3">..<tr>
    <tr class="row-4">..<tr>
    <tr class="row-5">..<tr>
    <tr class="row-6">..<tr>
    <tr class="row-7"><tr>
    <tr class="row-8">..<tr>
    <tr class="row-9">..<tr>
    <tr class="row-10">..<tr>
    <tr class="row-11">..<tr>
...etc

for this example TR with classes "row-2" and "row-7" is parrent product link wich expand child rows.

<script>
$(function() {
    $('tr.parent')
        .css("cursor","pointer")
        .css("color","red")
        .attr("title","Click to expand/collapse")
        .click(function(){
            $(this).siblings('.child-'+this.id).toggle();
        });
    $('tr[@class^=child-]').hide().children('td');
});
</script>

Rows -3...-6 is child of row-2 and Rows -8...-11 is child of row-7

How i can find row-2, row-7, etc then add second class "parrent" and ID similar class (id="row-2", id="row-7", etc)? Also i need add in each TR between row-2 and row-7 class equal previous parrent row. In bottom line i need something like this:

        <tr class="row-2 parrent" id="row-2"><tr>
        <tr class="row-3 child-row2">..<tr>
        <tr class="row-4 child-row2">..<tr>
        <tr class="row-5 child-row2">..<tr>
        <tr class="row-6 child-row2">..<tr>
        <tr class="row-7 parrent" id="row-7"><tr>
        <tr class="row-8 child-row7">..<tr>
        <tr class="row-9 child-row7">..<tr>
        <tr class="row-10 child-row7">..<tr>
        <tr class="row-11 child-row7">..<tr>
..etc

Thanks for any Help.