js数组的去重和排序

var numbers = [20, 25, 25, 35, 15, 35, 15, 18, 58, 66, 45];
var n = [];
var quchong = function (event) {
    for (var i = 0; i < event.length; i++) {
        if (n.indexOf(event[i]) == -1) n.push(event[i]);
    }

};
quchong(numbers);
n.sort();
console.log(n);