second max of an array javascript

1var secondMax = function (){ 
2    var arr = [20, 120, 111, 215, 54, 78]; // use int arrays
3    var max = Math.max.apply(null, arr); // get the max of the array
4    arr.splice(arr.indexOf(max), 1); // remove max from the array
5    return Math.max.apply(null, arr); // get the 2nd max
6};
7