冒泡排序

var arr = [21, 434, 11, 333, 75, 39, 90, 234, 66, 85];

for(var i = 0; i < arr.length - 1; ++i) {  for(var u = 0; u < arr.length - 1 - i; ++u) {    if(arr[u] > arr[u + 1]) {      var temp = arr[u + 1];      arr[u + 1] = arr[u];      arr[u] = temp;    }  }}console.log(arr);