JS 遍历2维数组

js 遍历2维数组:

var successfn = function(jdata){
             /*var jdata = eval(jdata);*/
             $(".gridtable").empty();
             var _HTML="<tr >";
             console.log(jdata)
             
这里的jdata 打印出来的是2维数组

 console.log('aaaaaaaaaaa');
 console.log(jdata);
 console.log(jdata.length);
 console.log('aaaaaaaaaaa');
    
数组长度124

for(var L1=0;L1<jdata.length;L1++){
     var newArr = jdata[L1];    

     遍历每个数组元素
     for (var L2=0;L2<newArr.length;L2++){