[jQuery] jquery 1.2.1 script not working with 1.3.2

[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Is some of this code outdated?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
;
        }
;
    $
'tr[@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!