[jQuery] jquery 1.2.1 script not working with 1.3.2

I've been working with this script that is used within to group a
parent row with it's children, and then expand the children rows out
when you click on the parent.  I'm having trouble getting it to work
in internet explorer using jquery-1.3.2.min.js  The original script
was using jquery-1.2.1.js.

Is some of this code outdated? and what could I replace it with?

$(function() {
        $('tr.parent')
                .css("cursor","pointer")
                .attr("title","Click to expand/collapse")
                .click(function(){
                        $(this).siblings('.child-'+this.id).toggle();
                });
        $('t...@class^=child-]').hide().children('td');
});

It doesn't list any error on the page, it just doesn't toggle the
children to visible when you click the parent row.

Here is a demo page where I got the script from:
http://www.javascripttoolbox.com/jquery/#expandablerows

Thanks!