arrays - Simple javascript program -

i'm getting started on learning javascript, , i'm creating simple program takes largest numbers array, , put them in new array, returned in end.

the function called largestof(), , example,

largestof([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]) should return [27,5,39,1001]. 

what have far this, , don't know how fix it, or if has way utilizing brackets.

function largestof(arr) {     var narr = [];     (var = 0; < arr.length; i++) {         n = arr[i].length;         max = 0;         for(var j = 0; j < n; j ++) {             if (arr[i][j] > max) {                 max = arr[i][j];                 narr.push(max);             }          }     }      return narr; } 

what trying here pretty straightforward. i'm running through every block in array, picking max, , putting max in own array (narr) other max's.

i want know how fix have while still doing way.

thank you

function largestof(arr) {     var narr = [];     (var = 0; < arr.length; i++) {         var n = arr[i].length;         var max = 0;         (var j = 0; j < n; j++) {             if (arr[i][j] > max) {                 max = arr[i][j];             }         }         narr.push(max); // push max outside of inner loop     }     return narr; }