Compiled relatively good JavaScript methods and techniques

Suitable reading range: People who know nothing about JavaScript ~ only one step away from mastering
Basic knowledge: HTML

That’s all JavaScript 1: Basic knowledge

1 Create script block

1:

2 Hidden script code

1:

Relevant code will not be executed in browsers that do not support JavaScript

3 Displayed when the browser does not support it

1:

4 Link external script files

1:

5 Comment script

1: // This is a comment
2: document.write(“Hello”); // This is a comment
3: /*
4: All of this
5: is a comment
6: */

6 Output to browser

1: document.write( "Hello");

7 Define variables

1: var myVariable = “some value”;

8 String addition

1: var myString = “String1” “String2”;

9 String search

1:

10 characters String replacement

1: thisVar.replace(“Monday”,”Friday”);

11 Format string

1:

12 Create array

1:

13 Array sorting

1:

14 分割字符串

1:
2:
10:

15 弹出警告信息

1:
2:
5:

16 弹出确认框

1:
2:
5:

17 定义函数

1:
2:
8:

18 调用JS函数

1: Link text
2: Link text

19 在页面加载完成后执行函数

1:
2: Body of the page
3:

20 条件判断

1: <script> <br>2:  <br>7: </script>
21 指定次数循环

1: <script> <br>2:  <br>11: </script>

22 设定将来执行

1: <script> <br>2:  <br>8: </script>

23 定时执行函数

1: <script> <br>2:  <br>9: </script>

24 取消定时执行

1: <script> <br>2:  <br>9: </script>

25 在页面卸载时候执行函数

1:
2: Body of the page
3:

JavaScript就这么回事2：浏览器输出

26 访问document对象

1:
2: var myURL = document.URL;
3: window.alert(myURL);
4:

27 动态输出HTML

1:
2: document.write(“

Here's some information about this document:

”);
3: document.write(“

Referring Document: “ document.referrer “

Domain: “ document.domain “

URL: “ document.URL “

”);
8:

28 输出换行

1: document.writeln(“a”);
2: document.writeln(“b”);

29 输出日期

1:
2: var thisDate = new Date();
3: document.write(thisDate.toString());
4:

30 指定日期的时区

1:
2: var myOffset = -2;
3: var currentDate = new Date();
4: var userOffset = currentDate.getTimezoneOffset()/60;
5: var timeZoneDifference = userOffset - myOffset;
6: currentDate.setHours(currentDate.getHours() timeZoneDifference);
7: document.write(“The time and date in Central Europe is: “ currentDate.toLocaleString());
8:

31 设置日期输出格式

1:
2: var thisDate = new Date();
3: var thisTimeString = thisDate.getHours() “:” thisDate.getMinutes();
4: var thisDateString = thisDate.getFullYear() “/” thisDate.getMonth() “/” thisDate.getDate();
5: document.write(thisTimeString “ on “ thisDateString);
6:

32 读取URL参数

1:
2: var urlParts = document.URL.split(“?”);
3: var parameterParts = urlParts[1].split(“&”);
4: for (i = 0; i < parameterParts.length; i ) {
5: var pairParts = parameterParts[i].split(“=”);
6: var pairName = pairParts[0];
7: var pairValue = pairParts[1];
8: document.write(pairName “ ：“ pairValue );
9: }
10:

你还以为HTML是无状态的么？

33 打开一个新的document对象

1:
2: function newDocument() {
3: document.open();
4: document.write(“

This is a New Document.

”);
5: document.close();
6: }
7:

34 页面跳转

1:
2: window.location = “http://www.php.cn/”;
3:

35 添加网页加载进度窗口

1:
2:
3:
4: var placeHolder = window.open('holder.html','placeholder','width=200,height=200');
5:
6: The Main Page
7:
8:
9:

This is the main page

10:
11:
JavaScript就这么回事3：图像

36 读取图像属性

1:
2: Width
3:

37 动态加载图像

1:
2: myImage = new Image;
3: myImage.src = “Tellers1.jpg”;
4:

38 简单的图像替换

1:
2: rollImage = new Image;
3: rollImage.src = “rollImage1.jpg”;
4: defaultImage = new Image;
5: defaultImage.src = “image1.jpg”;
6:
7: 8: onMouseOut=”document.myImage.src = defaultImage.src;”>
9:

39 随机显示图像

1:
2: var imageList = new Array;
3: imageList[0] = “image1.jpg”;
4: imageList[1] = “image2.jpg”;
5: imageList[2] = “image3.jpg”;
6: imageList[3] = “image4.jpg”;
7: var imageChoice = Math.floor(Math.random() * imageList.length);
8: document.write(‘');
9:

40 函数实现的图像替换

1:
2: var source = 0;
3: var replacement = 1;
4: function createRollOver(originalImage,replacementImage) {
5: var imageArray = new Array;
6: imageArray[source] = new Image;
7: imageArray[source].src = originalImage;
8: imageArray[replacement] = new Image;
9: imageArray[replacement].src = replacementImage;
10: return imageArray;
11: }
12: var rollImage1 = createRollOver(“image1.jpg”,”rollImage1.jpg”);
13:
14: 15: onMouseOut=”document.myImage1.src = rollImage1[source].src;”>
16:
17:

41 创建幻灯片

1:
2: var imageList = new Array;
3: imageList[0] = new Image;
4: imageList[0].src = “image1.jpg”;
5: imageList[1] = new Image;
6: imageList[1].src = “image2.jpg”;
7: imageList[2] = new Image;
8: imageList[2].src = “image3.jpg”;
9: imageList[3] = new Image;
10: imageList[3].src = “image4.jpg”;
11: function slideShow(imageNumber) {
12: document.slideShow.src = imageList[imageNumber].src;
13: imageNumber = 1;
14: if (imageNumber < imageList.length) {
15: window.setTimeout(“slideShow(“ imageNumber “)”,3000);
16: }
17: }
18:
19:
20:
21:

42 随机广告图片

1:
2: var imageList = new Array;
3: imageList[0] = “image1.jpg”;
4: imageList[1] = “image2.jpg”;
5: imageList[2] = “image3.jpg”;
6: imageList[3] = “image4.jpg”;
7: var urlList = new Array;
8: urlList[0] = “http://www.php.cn/”;
9: urlList[1] = “http://www.php.cn/”;
10: urlList[2] = “http://www.php.cn/”;
11: urlList[3] = “http://www.php.cn/”;
12: var imageChoice = Math.floor(Math.random() * imageList.length);
13: document. write('

');
14:
JavaScript That’s It 4: Form

Let’s continue writing the JS That’s It series first~
43 Form Composition

1 :
4: Check Text Field

45 Dynamically copy text box content

1:

47 Access the selected Select

1:
8: Check Selection List

48 Dynamically add Select items

1:

50 Verify Select items

1: function checkList(selection) {
2: if (selection.length == 0) {
3: window.alert(“You must make a selection from the list.”);
4: return false;
5: }
6: return true;
7: }

51 动态改变表单的action

1:
2: Username:

3: Password:

4:
5:
6:
7:

52 使用图像按钮

1:
2: Username:

3: Password:

4:
5:
6:

53 表单数据的加密

1:
2:
17:
18:
19: Enter Some Text:
20:

JavaScript就这么回事5：窗口和框架

54 改变浏览器状态栏文字提示

1:
2: window.status = “A new status message”;
3:

55 弹出确认提示框

1:
2: var userChoice = window.confirm(“Click OK or Cancel”);
3: if (userChoice) {
4: document.write(“You chose OK”);
5: } else {
6: document.write(“You chose Cancel”);
7: }
8:

56 提示输入

1:
2: var userName = window.prompt(“Please Enter Your Name”,”Enter Your Name Here”);
3: document.write(“Your Name is “ userName);
4:

57 打开一个新窗口

1: //打开一个名称为myNewWindow的浏览器新窗口
2:
3: window.open(“http://www.php.cn/”,”myNewWindow”);
4:

58 设置新窗口的大小

1:
2: window.open(“http://www.php.cn/”,”myNewWindow”,'height=300,width=300');
3:

59 设置新窗口的位置

1:
2: window.open(“http://www.php.cn/”,”myNewWindow”,'height=300,width=300,left=200,screenX=200,top=100,screenY=100');
3:

60 是否显示工具栏和滚动栏

1:

62 Load a new document into the current window

1: Open New Document

63 Set the scroll position of the page

1:

64 Open a full-screen window in IE

1: Open a full-screen window

65 New window and parent window operations

1:
6: In the new window Close the parent window in the window
7: window.opener.close()

66 Write content in the new window

1:

67 Load the page into the frame page

1:
2:
3:
4:
5: Load the page in frame2 in frame1
6: parent.frame2.document.location = " 135b.html";

68 Sharing scripts between frame pages
If there is a script in the html file in frame1

1: function doAlert() {
2: window.alert(“Frame 1 is loaded”);
3: }

Then the method can be called like this in frame2

1:
2: This is frame 2.
3:

69 Data public
can be found on the frame page Define data items so that the data can be shared by pages in multiple frames

1:
4:
5:
6:
7:

This way in frame1 Variables persistentVariable can be used in both frame2 and frame2
70 Framework code base
According to some of the above ideas, we can use a hidden frame page as the code base of the entire frame set

1: < frameset cols="0,50%,*">
2:
3:
4:
5:

Compiled relatively good JavaScript methods and techniques_Basic knowledge