js字符串切割为二维数组

        if ($("#nr").val() != "") {
            var nr = $("#nr").val();/*该字符串为0_0|0_1|0_2|0_3|0_4|0_5|0_6|0_7|0_8|0_9|0_10,1_0|1_1|1_2|1_3|1_4|1_5|1_6|1_7|1_8|1_9|1_10,2_0|2_1|2_2|2_3|2_4|2_5|2_6|2_7|2_8|2_9|2_10,3_0|3_1|3_2|3_3|3_4|3_5|3_6|3_7|3_8|3_9|3_10,4_0|4_1|4_2|4_3|4_4|4_5|4_6|4_7|4_8|4_9|4_10,5_0|5_1|5_2|5_3|5_4|5_5|5_6|5_7|5_8|5_9|5_10,6_0|6_1|6_2|6_3|6_4|6_5|6_6|6_7|6_8|6_9|6_10,7_0|7_1|7_2|7_3|7_4|7_5  */
            var arr1 = nr.split(','); //定义一维数组
            for (var i = 0; i < 7; i++) {
                arr1[i] = arr1[i].split('|');
            }

            for (var i = 0; i < 8; i++) {
                for (var j = 0; j < 11; j++) {
                    alert(arr1[i][j]);
                }
            }
        }