1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Title</title>
6 </head>
7 <body>
8 <hr><h1>循环遍历对象“person”的属性</h1>
9 <button onclick="myFunction()">点击显示循环</button>
10 <p id="demo"></p>
11 <p id="demo1"></p>
12 <hr><h1>数组方法</h1>
13 <p id="demo2"></p>
14 <button onclick="myFunction1()">点击将数组作为字符串输出</button>
15 <hr><h1>Math（算数） 对象</h1>
16 <p id="demo3"></p>
17 <button onclick="myFunction2()">点击显示算数</button>
18 <hr><h1>RegExp：是正则表达式（regular expression）</h1>
19 <p id="demo4"></p>
20
21 <script>
22 function myFunction() {
23 var x,txt = "";
24 var person={fname:"Bill ",lname: "Gates ",age:56};
25 for (x in person){
26 txt+=person[x];
27 }
28 document.getElementById("demo").innerHTML=txt;
29 }
30 function person(firstname,lasrname,age,eyecolor) {//使用函数来构造对象
31 this.firstname = firstname;
32 this.lastname = lasrname;
33 this.age = age;
34 this.eyecolor = eyecolor;
35 // this.nationality = "English";
36 this.changeName = changeName;
37 function changeName(name) {
38 this.lastname = name;
39 }
40 }
41 person.prototype.nationality = "English";// 添加属性；相当于this.nationality = "English";
42 person.prototype.name = function(){return this.firstname + " "+ this.lastname};//给对象的构造函数添加新的方法
43
44 myMother = new person("Sally","Rally",48,"Green");
45 myMother.changeName("Doe");//changeName() 函数 name 的值赋给 person 的 lastname 属性。
46 document.getElementById("demo").innerHTML=myMother.nationality;
47 document.getElementById("demo1").innerHTML=myMother.name();
48
49 document.write(myMother.lastname);
50 document.write(myMother.firstname,myMother.lastname,myMother.age,myMother.eyecolor);
51
52 var hege = ["Cecilie","Lone"];
53 var stale = ["Emil","Tobias","Linus"];
54 var brothers = ["Jani","Tove"];
55 var Children = hege.concat(stale);//合并两个数组 - concat()
56 var Children1 = hege.concat(stale,brothers);//合并三个数组 - concat()
57 document.write(Children);
58 document.write(Children1);
59
60 function myFunction1() {
61 var fruits = ["Banana","Orange","Apple","Mango","Lemon"];
62 var x = document.getElementById("demo2");
63 x.innerHTML = fruits.join();
64 fruits.pop();//删除数组的最后一个元素
65 x.innerHTML = fruits;
66 fruits.push("Kiwi");//给数组添加新的元素
67 x.innerHTML = fruits;
68 fruits.reverse();//将数组反转排序
69 x.innerHTML = fruits;
70 fruits.shift();//删除数组的第一个元素
71 x.innerHTML = fruits;
72 var citrus = fruits.slice(1,3);//截取数组下标 1 到 2 的元素
73 x.innerHTML = citrus;
74 fruits.sort();//字母升序排列数组
75 x.innerHTML = fruits;
76 var points = [100,10,15,45,56,77];//数字升序排列数组
77 points.sort(function (a,b) {return a-b});
78 x.innerHTML = points;
79 points.sort(function (a,b) {return b-a});//数字降序排列数组
80 x.innerHTML = points;
81 fruits.splice(2,0,"Lemon","Kiwi","Kiwi1");//向数组第2个位置添加元素;0指的是覆盖后面几个元素
82 x.innerHTML = fruits;
83 x.innerHTML = fruits.toString();//将数组转为字符串并返回
84 fruits.unshift("Pineapple","Pineapple1");//在数组的开头插入元素
85 x.innerHTML = fruits;
86 }
87
88 document.write("<br>"+Math.floor(Math.random()*11));// floor() 方法和 random() 来返回一个介于 0 和 11 之间的随机数
89 function myFunction2() {
90 document.getElementById("demo3").innerHTML=Math.round(2.6);//round 方法对一个数进行四舍五入
91 document.getElementById("demo3").innerHTML=Math.random();//返回一个介于 0 和 1 之间的随机数
92 document.getElementById("demo3").innerText = Math.max(2,2.6);//max() 来返回两个给定的数中的较大的数;min() 来返回两个给定的数中的较小的数
93 }
94
95 var str="Is this all there is?";
96 var patt1 = /is/gi;//i 不区分大小写的匹配；g 全文的搜索（而不是在找到第一个就停止查找,而是找到所有的匹配）
97 document.write(str.match(patt1));
98 </script>
99 </body>
100 </html>
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