js jquery 表格取值

                $('#productTable tr').each(function(i){
                    if(i>=1){
                        var price =  $(this).children('td').eq(3).text();
                        var successPrice = $(this).children('td').eq(4).text();
                        var number =  $(this).children('td').eq(8).children('#tdinput').val();
                        if(!isEmpty(trim(number))){
                            var cost = parseInt(price) - parseInt(successPrice);
                            totleCostAmt += cost * number;
                        }
                    }
                });