Testing of Clicking of Checkbox

We have checkboxes registered for onchange event handler. In testing using blueridge, to simulate checking of a checkbox, the following more ideal approaches, sadly, don't work:

1 2	$("input:checkbox:first").change(); #1 $("input:checkbox:first").click().change(); #2

But the following works:

1	$("input:checkbox:first").attr('checked', true).change();

Bitten once.