jquery控制datalist里面的值

$("#D_data").each(function () {
                 //D_data_T_count_     数量
                 //D_data_L_sumprice_  总价
                 //D_data_L_price_     单价

                 //size指的是查询到元素的个数

                //获取或设置嵌套在datalist中的值 使用innertext属性

                 for (var i = 0; i < $("#D_data").find("table").size(); i++) {
                     var L_price = parseInt($("#D_data_L_price_" + i).attr("innerText"));
                     var count = parseInt($("#D_data_T_count_" + i).val());
                     if ($("#D_data_T_count_" + i).val() != "")

                         $("#D_data_L_sumprice_" + i).attr("innerText", L_price * count);
                       
                    
                 } t = setTimeout(ss, 500);
             })