[jQuery] Checkbox selector not working

[Chandra]

Hi Guys

I am new to jQuery...

I am trying to get all the checkboxes checked in the form

$("inp...@name^=ddcommercialtypes_check][type='checkbox']
[checked='true']").each(function() {
                    checkedBoxes1 += "," + $(this)[0].value;
            });

Here I am getting all the checkboxes checked in that form, instead of
checkboxes with the names starting with "ddCommercialTypes_Check".

Please let me know what I am doing wrong in that selector statement...

Thanks
Chandra