<!DOCTYPE html> <title>Title</title> <script> var arr = [1,2,3,4,11]; var s = prompt("请输入一个数字"); var middle_index = 0; var result =[]; if (i%2 == 0) { middle_index = arr.length/2-1; } else { middle_index = (arr.length+1)/2-1; } var middle_value = arr[middle_index];
if (s>middle_value) { for (var i=middle_index+1;i<arr.length;i++) { if (s>arr[i] && i<arr.length-1) { result.push(arr[i]); } else if (s>arr[i] && i == arr.length-1) { result.push(arr[i]); result.push(s); } else { result.push(s); result.push(arr[i]); } } arr = arr.slice(0,middle_index+1); arr = arr.concat(result); } else if (s == middle_value) { var arr1 = arr.slice(0,middle_index+1); arr1.push(s); arr = arr1.concat(arr.slice(middle_index+1)); } else { for (var i=0;i<middle_index+1;i++) { if (s<arr[i] && i ==0) { result.push(s); result.push(arr[i]); } else if (s<arr[i] && i >0) { result.push(s); result.push(arr[i]); } else { result.push(arr[i]); } } arr = arr.slice(middle_index+1); arr = result.concat(arr); } document.write(arr); </script></head><body>
</body></html>
