js定时循环输出数组的值

var arr = [23, 2, 3, 45, 67, 43];
    var length = arr.length;
    var i = 0;
    for (i; i < length; i++) {
        var j = 0;
        setTimeout(function () {
            console.log(arr[j++]);
        }, i * 2000)
    }