javascript入门代码整理，适合对java script一无所知～离精通只差一步之遥的人

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Java JavaScript 框架脚本浏览器

JS入门代码2009/04/21 13:59JS入门代码

适合阅读范围：对java script一无所知～离精通只差一步之遥的人
基础知识：HTML

java script就这么回事1：基础知识

1 创建脚本块

1: <script language=”java script”>
2: java script code goes here
3: </script>

2 隐藏脚本代码

1: <script language=”java script”>
2: 
5: </script>

在不支持java script的浏览器中将不执行相关代码

3 浏览器不支持的时候显示

1: <noscript>
2: Hello to the non-java script browser.
3: </noscript>

4 链接外部脚本文件

1: <script language=”java script” src="/”filename.js"”></script>

5 注释脚本

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

6 输出到浏览器

1: document.write(“<strong>Hello</strong>”);

7 定义变量

1: var myVariable = “some value”;

8 字符串相加

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

9 字符串搜索

1: <script language=”java script”>
2: 
7: </script>

10 字符串替换

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

11 格式化字串

1: <script language=”java script”>
2: 
21: </script>

12 创建数组

1: <script language=”java script”>
2: 
11: </script>

13 数组排序

1: <script language=”java script”>
2: 
11: </script>

14 分割字符串

1: <script language=”java script”>
2: 
10: </script>

15 弹出警告信息

1: <script language=”java script”>
2: 
5: </script>

16 弹出确认框

1: <script language=”java script”>
2: 
5: </script>

17 定义函数

1: <script language=”java script”>
2: 
8: </script>

18 调用JS函数

1: <a href=”#” onClick=”functionName()”>Link text</a>
2: <a href="/”java script:functionName"()”>Link text</a>

19 在页面加载完成后执行函数

1: <body onLoad=”functionName();”>
2: Body of the page
3: </body>

20 条件判断

1: <script>
2: 
7: </script>

21 指定次数循环

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

22 设定将来执行

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

23 定时执行函数

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

24 取消定时执行

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

25 在页面卸载时候执行函数

1: <body onUnload=”functionName();”>
2: Body of the page
3: </body>

java script就这么回事2：浏览器输出

26 访问document对象

1: <script language=”java script”>
2: var myURL = document.URL;
3: window.alert(myURL);
4: </script>

27 动态输出HTML

1: <script language=”java script”>
2: document.write(“<p>Here’s some information about this document:</p>”);
3: document.write(“<ul>”);
4: document.write(“<li>Referring Document: “ + document.referrer + “</li>”);
5: document.write(“<li>Domain: “ + document.domain + “</li>”);
6: document.write(“<li>URL: “ + document.URL + “</li>”);
7: document.write(“</ul>”);
8: </script>

28 输出换行

1: document.writeln(“<strong>a</strong>”);
2: document.writeln(“b”);

29 输出日期

1: <script language=”java script”>
2: var thisDate = new Date();
3: document.write(thisDate.toString());
4: </script>

30 指定日期的时区

1: <script language=”java script”>
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: </script>

31 设置日期输出格式

1: <script language=”java script”>
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: </script>

32 读取URL参数

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

你还以为HTML是无状态的么？

33 打开一个新的document对象

1: <script language=”java script”>
2: function newDocument() {
3: document.open();
4: document.write(“<p>This is a New Document.</p>”);
5: document.close();
6: }
7: </script>

34 页面跳转

1: <script language=”java script”>
2: window.location = “http://www.99n9.com/”;
3: </script>

35 添加网页加载进度窗口

1: <html>
2: <head>
3: <script language='java script'>
4: var placeHolder = window.open('holder.html','placeholder','width=200,height=200');
5: </script>
6: <title>The Main Page</title>
7: </head>
8: <body );”>Open a full-screen window</a>

65 新窗口和父窗口的操作

1: <script language=”java script”>
2: //定义新窗口
3: var newWindow = window.open(“128a.html”,”newWindow”);
4: newWindow.close(); //在父窗口中关闭打开的新窗口
5: </script>
6: 在新窗口中关闭父窗口
7: window.opener.close()

66 往新窗口中写内容

1: <script language=”java script”>
2: var newWindow = window.open(“”,”newWindow”);
3: newWindow.document.open();
4: newWindow.document.write(“This is a new window”);
5: newWIndow.document.close();
6: </script>

67 加载页面到框架页面

1: <frameset cols=”50%,*”>
2: <frame name=”frame1” src="/”135a.html"”>
3: <frame name=”frame2” src="/”about:blank"”>
4: </frameset>
5: 在frame1中加载frame2中的页面
6: parent.frame2.document.location = “135b.html”;

68 在框架页面之间共享脚本
如果在frame1中html文件中有个脚本

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

那么在frame2中可以如此调用该方法

1: <body onLoad=”parent.frame1.doAlert();”>
2: This is frame 2.
3: </body>

69 数据公用
可以在框架页面定义数据项，使得该数据可以被多个框架中的页面公用

1: <script language=”java script”>
2: var persistentVariable = “This is a persistent value”;
3: </script>
4: <frameset cols=”50%,*”>
5: <frame name=”frame1” src="/”138a.html"”>
6: <frame name=”frame2” src="/”138b.html"”>
7: </frameset>

这样在frame1和frame2中都可以使用变量persistentVariable
70 框架代码库
根据以上的一些思路，我们可以使用一个隐藏的框架页面来作为整个框架集的代码库

1: <frameset cols=”0,50%,*”>
2: <frame name=”codeFrame” src="/”140code.html"”>
3: <frame name=”frame1” src="/”140a.html"”>
4: <frame name=”frame2” src="/”140b.html"”>
5: </frameset>