1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Document</title>
6 </head>
7 <body>
8 <!--<script type="text/javascript">
9 var arr = [1,20,18,44,66,21];//求数组中的最大值
10 var arr_max = arr[0];//假设下标为0的第一位数1为最大值
11 var arr_length = arr.length;//得到长度
12 for(var i=0;i<arr_length;i++){
13 //i=0,从下标为0开始，即第一位数 //数组的遍历，数组的长度arr_length
14 if(arr_max < arr[i]){ //<求最大值 >求最小值
15 //如果arr_max这个值比数组中的其他元素的值小，则
16 arr_max = arr[i]; //赋值
17 }//循环，直到得出最大值66
18 }
19 document.write("最大值为："+arr_max);
20 </script>-->
21 <!--<script type="text/javascript">
22 function HelloWorld (m,n) {
23 var str = "<table width=‘600‘ border=‘1‘ align=‘center‘>";
24 for(var i=1;i<=m;i++){
25 str += "<tr>";
26 for(var j=1;j<=n;j++){
27 str += "<td> </td>";
28 }
29 str += "<tr>";
30 }
31 str += "</table>"
32 document.write(str+"<hr/>");
33 }
34 HelloWorld(9,9);
35 HelloWorld(15,15);
36 HelloWorld(6,15);
37 </script>-->
38 <script type="text/javascript">
39 var arr = [
40 ["周更生","男",30,true,"大专",5000,500,,"山东省"],
41 ["刘晓庆","女",26,false,"研究生",8000,1500,"北京科技大学","山西省"],
42 [" 李大大","男",38,true,"大专",1000,250,"清华大学","陕西省"],
43 ["李强","女",34,true,"高中",11000,30,"河北大学","江苏省"],
44 ];
45
46 var arr_length = arr.length;
47 var str="<table width=‘600‘ align=‘center‘ border=‘1‘ style=‘border-collapse:collapse‘>";
48 str +="<caption>学生信息</caption>";
49 for(var i=0;i<=arr_length;i++){
50 str+="<tr>";
51 for(var j=0; j<arr[i].length;j++){
52 str += "<td>"+arr[i][j]+"</td>";
53 }
54
55 str += "</tr>";
56 }
57
58 str += "</table>";
59 document.write(str);
60
61 </script>
62 </body>
63 </html>
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Document</title>
6 </head>
7 <body>
8 <script type="text/javascript">
9 for(var num=1;num<=100;num++){
10 var count = 0;
11 for(var i=1;i<=num;i++){
12 if(num % i == 0){
13 count++;
14 }
15 }
16 if(count == 2){
17 document.write(num+" 是质数<br/>");
18 }
19 }
20 </script>-->
21 <script type="text/javascript">
22 for(var i=1;i<100;i++){
23 if(i>50){
24 break;
25 }
26 document.write(i+"<br>");
27 }
28 for(name in window){
29 document.write(name+"<br>");
30 }
31 var a = function(a){
32 return a*a*a;
33 }
34 document.write(a(10));
35 function getSum (a,b,c) {
36 return a+b+c;
37 }
38 document.write(getSum(10,20,30));*/ //求三个值的和
39 </script>
40 <script type="text/javascript">
41 var houdu = 0.01/1000;
42 for(var i=1;i<=30;i++){
43 houdu =houdu*2;
44 if(houdu>1 && houdu<2){
45 document.write("一张纸对折"+i+"次后，就超过1米厚了<br/>");
46 }
47 }
48 document.write("则该纸对折30次后是多厚"+houdu+"米") ;
49
50 </script>-->
51 <script type="text/javascript">
52 function counte (a,b) {
53 var cha=a-b;
54 var ji=a*b;
55 var he=a+b;
56 var chu=a/b;
57 return [cha,ji,he,chu];
58
59 }
60 document.write("差，积，和，除分别为:"+counte(20,10));
61 </script>
62 </body>
63 </html>
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Document</title></head><body><script type="text/javascript">for(var num=1;num<=100;num++){var count = 0;for(var i=1;i<=num;i++){if(num % i == 0){count++;}}if(count == 2){document.write(num+" 是质数<br/>");}}</script>--><script type="text/javascript">for(var i=1;i<100;i++){if(i>50){break;}document.write(i+"<br>");} for(name in window){document.write(name+"<br>");}var a = function(a){return a*a*a;}document.write(a(10));function getSum (a,b,c) { return a+b+c; }document.write(getSum(10,20,30));*/ //求三个值的和</script><script type="text/javascript">var houdu = 0.01/1000;for(var i=1;i<=30;i++){houdu =houdu*2;if(houdu>1 && houdu<2){document.write("一张纸对折"+i+"次后，就超过1米厚了<br/>");}}document.write("则该纸对折30次后是多厚"+houdu+"米");</script>--><script type="text/javascript">function counte (a,b) { var cha=a-b; var ji=a*b; var he=a+b; var chu=a/b; return [cha,ji,he,chu]; }document.write("差，积，和，除分别为:"+counte(20,10));</script></body></html>