Array Conversion problem in jquery

hi following is a working example

var totals = [0, 0, 0, 0, 0, 0];
            var $dataRows = $("#GridViewProfit tr:not('.totalColumn, .titlerow')");
            $dataRows.each(function () {
                $(this).find('.rowDataSd').each(function (i) {
                    var k = parseInt($(this).html());
                    if ($(this).html() != '') {

                        totals[i] += parseInt($(this).html());
                        console.log(totals[i]);
                         $("#GridViewProfit tr:last td").eq(i + 1).html(totals[i]).css('background-color', 'white');
                    }
                });
            })

;
This code is for calculate the sum of values in columns and display at the bottom of each columns
here iam directly declare totals as

var totals=[0,0,0,0,0,0];

my requirement is to create totals dynamically

like following code

  var str;
            var l = $('#GridViewProfit tr th').length - 1;
            str = '[';
            for (k = 0; k < l; k++) {
                str += "0" + ' ,';

            }          
          
            var bb = str;
            bb = bb.slice(0, -1);
            bb += ']';
            bb = bb.substring(-1, bb.length);
totals=bb;

here iam getting totals=[0,0,0,0,0,0]
but it is not working
i have checked totals using console.log and alert then it is showing [0,0,0,0,0,0]
when i check with debugger in IE
then totals showing as "[0,0,0,0,0,0]"
both quotes are not showing in console.log and alert
how to solve this

Regards
Baiju