1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
5 <title></title>
6 <meta charset="utf-8" />
7 </head>
8 <body>
9 <script>
10 var a = prompt("请输入名字", "");
11 document.write(a);
12 </script>
13
14 <script>//输出个位 十位 百位 千位
15 var a = 1234;
16 var qianwei = a / 1000;
17 var baiwei = a % 1000 / 100;
18 var shiwei = a % 1000 % 100 / 10;
19 var gewei = a % 1000 % 100 % 10;
20 document.write(a + "<br/>");
21 document.write(parseInt(qianwei)+"<br/>");
22 document.write(parseInt(baiwei) + "<br/>");
23 document.write(parseInt(shiwei) + "<br/>");
24 document.write(gewei + "<br/>");
25 </script>
26
27 <script> //bim指数
28 var tz = 110;
29 var sg = 170;
30 var bmi = tz / (sg * sg);
31 if (bmi < 18.5) {
32 alert("偏瘦");
33 }else if(bmi<=23.9){
34 alert("正常");
35 } else if (bmi < 27.9) {
36 alert("偏胖");
37 }
38 </script>
39 <script>//韩信点兵
40 for (i = 100; i <= 200;i++){
41 if (i % 3 == 1) {
42 if(i%5==2){
43 if(i%7==5){
44 document.write("韩信点兵 "+i+"<br/>");
45 }
46 }
47 }
48 }
49 </script>
50 <script> //水仙花
51 var baiwei, shiwei, gewei;
52 for (i = 100; i < 1000;i++){
53 //huoqu
54 baiwei = parseInt(i / 100);
55 shiwei = parseInt(i % 100 / 10);
56 gewei = parseInt(i % 100 % 10);
57 if (Math.pow(baiwei, 3) + Math.pow(shiwei,3) + Math.pow(gewei ,3) == i) {
58 document.write("水仙花 "+i+"<br/>");
59 }
60 }
61 </script>
62 <script> //鸡翁百鸡
63 var z;
64 for (x = 1; x < 20;x++){
65 for (y = 1; y < 25;y++){
66 z = 100 - x - y;
67 if(z%3==0&&x+y+z==100&&5*x+3*y+z/3==100){
68 document.write("公鸡:"+x+"<br/>"+"母鸡:"+y+"<br/>"+"小鸡"+z+"<br/>");
69 }
70 }
71 }
72 </script>
73 <script> //高斯求和
74 var a = new Array(100);
75 for (i = 0; i < a.length;i++){
76 a[i] = i + 1;
77 }
78 var sum=0;
79 for (i = 0; i < a.length / 2; i++){
80 sum += a[i] + a[a.length - (i + 1)]
81 }
82 document.write(sum);
83 </script>
84
85 </body>
86 </html>
