Loop through Subgrid records

function RetrieveSubGridRecords() {

    if (document.getElementById("SubgridId")) {

        var grid = document.getElementById("SubgridId").control;
        var totalBilled = 0;
        var totalUnBilled =0;
        for (var rowNo = 0; rowNo < grid.GetRecordsFromInnerGrid().length; rowNo++)
        {
           
            if(grid.GetRecordsFromInnerGrid()[rowNo][3].cells[7].outerText.indexOf("Yes") >= 0)
            {
                var numvalue = grid.GetRecordsFromInnerGrid()[rowNo][3].cells[6].outerText.replace(new RegExp(',', 'g'), '');
                alert(numvalue);
                totalBilled = totalBilled + parseFloat(numvalue);
                alert("yes"+totalBilled);
            }
            else
            {
                var numvalue = grid.GetRecordsFromInnerGrid()[rowNo][3].cells[6].outerText.replace(new RegExp(',', 'g'), '');
                alert(numvalue);
                totalUnBilled = totalUnBilled + parseFloat(numvalue);
                alert("no"+totalUnBilled);
            }
               
        }
        Xrm.Page.getAttribute("new_totalbilledamount").setValue(totalBilled);
        Xrm.Page.getAttribute("new_totalunbilledamt").setValue(totalUnBilled);        

    }

    else {

        setTimeout("RetrieveSubGridRecords();", 2500);

    }


}