初學網頁Javascript經典小教程總結

2024-05-06 16:54:40

字體：大中小

來源：轉載

供稿：網友

適合閱讀范圍：對JavaScript一無所知～離精通只差一步之遙的人
基礎知識：HTML

JavaScript就這么回事1：基礎知識

1 創建腳本塊

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

2 隱藏腳本代碼

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

在不支持JavaScript的瀏覽器中將不執行相關代碼

3 瀏覽器不支持的時候顯示

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

4 鏈接外部腳本文件

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

5 注釋腳本

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

6 輸出到瀏覽器

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

7 定義變量

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=”JavaScript”>
2: 
7: </script>

10 字符串替換

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

11 格式化字串

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

12 創建數組

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

13 數組排序

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

14 分割字符串

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

15 彈出警告信息

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

16 彈出確認框

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

17 定義函數

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

18 調用JS函數

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

19 在頁面加載完成后執行函數

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

20 條件判斷

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

21 指定次數循環

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

22 設定將來執行

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

23 定時執行函數

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

24 取消定時執行

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

25 在頁面卸載時候執行函數

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

JavaScript就這么回事2：瀏覽器輸出

26 訪問document對象

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

27 動態輸出HTML

1: <script language=”JavaScript”>
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 輸出換行

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

29 輸出日期

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

30 指定日期的時區

1: <script language=”JavaScript”>
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 設置日期輸出格式

1: <script language=”JavaScript”>
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 讀取URL參數

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

你還以為HTML是無狀態的么？

33 打開一個新的document對象

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

34 頁面跳轉

1: <script language=”JavaScript”>
2: window.location = “http://www.webjx.com/”;
3: </script>

35 添加網頁加載進度窗口

1: <html>
2: <head>
3: <script language='javaScript'>
4: var placeHolder = window.open('holder.html','placeholder','width=200,height=200');
5: </script>
6: <title>The Main Page</title>
7: </head>
8: <body >
9: <p>This is the main page</p>
10: </body>
11: </html>