function get_order(array){

            for(var i = 0; i <array.length-1; i++){

                for(var j = 0; j < array.length - 1 -i; j++){

                    if(array[j] < array[j+1]){

                        var tem = array[j];

                        array[j] = array[j+1];

                        array[j+1] = tem;

                    }

                }

            }

            return array;

        }

        console.log(get_order([5,7,10,2,15,1,91]));

function max(a,b){

            return a > b ? a : b;

        }

        var a = prompt('请输入第1个数')-0;

        var b = prompt('请输入第2个数')-0;

        alert(max(a,b));

function get_year(year){

            if(year % 4 == 0 && year % 100 != 0 || year % 100 == 0){

                return true;

            }else {

                return false;

            }

        }

        var year = prompt('输入年份');

        if(Number(get_year(year)) == 1){

            alert('闰年');

        }else{

            alert('不是闰年');

        }

function get_day(year,month,day){

            var sum1=0,sum2=0;sum3=0,sum=0;

            for(var i = 1; i < month; i++){

                if(i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12) {

                    sum1 = sum1 + 31;

                }else if (i == 4 || i == 6 || i == 9 || i == 11) {

                    sum2 = sum2 + 30;

                }else {

                    sum3 = 28;

                }

            }

            sum = sum1 + sum3 + sum2 + day;

            if((year % 4 == 0 && year % 100 != 0 || year % 100 == 0) && month >= 2){

                sum += 1;

            }

            return sum;

        }

        var year = prompt('请输入年份')-0;

        var month = prompt('请输入月份')-0;

        var day = prompt('请输入日期')-0;

        alert("您输入的日期是第：" + get_day(year,month,day) + '天');