js 数组和函数

        //冒泡排序        var arry = [67, 64, 98, 12, 109];        for (var i = 0; i < arry.length - 1; i++) {            for (var j = 0; j < arry.length - 1 - i; j++) {                if (arry[j] > arry[j + 1]) {                    var temp;                    temp = arry[j];                    arry[j] = arry[j + 1];                    arry[j + 1] = temp;                }            }        }        console.log(arry);

        function reserve(arry) {            var newarry = [];            for (var i = arry.length - 1; i >= 0; i--) {                newarry[newarry.length] = arry[i]            }            return newarry;        }        var arry1 = reserve([1, 7, 9, 8, 10, 56]);        console.log(arry1);

        function backday() {            var year = prompt('请输入今年年份：');            if (panduan(year)) {                alert('今年是闰年有29天');            } else {                alert('今年是平年有28天');            }
        }        backday();
        function panduan(year) {            var flag = false;            if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {                flag = true;            }            return flag;        }

        //求任意个数数字的最大值        function getmax() {            var max = arguments[0];            for (i = 0; i < arguments.length; i++) {                if (arguments[i] > max) {                    max = arguments[i]                }            }            return max;        }        console.log(getmax(1, 2, 54, 67, 5));