JS入門代碼集合第2/4頁

更新時間：2008年05月29日 23:10:02 作者：

在閃吧看見了一篇js教程，感覺不錯適合閱讀范圍：對JavaScript一無所知～離精通只差一步之遙的人

21 指定次數(shù)循環(huán)

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

22 設定將來執(zhí)行

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

23 定時執(zhí)行函數(shù)

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

24 取消定時執(zhí)行

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

25 在頁面卸載時候執(zhí)行函數(shù)

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(tài)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(qū)

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(shù)

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(tài)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(zhuǎn)

1: <script language=”JavaScript”>
2: window.location = “http://www.liu21st.com/”;
3: </script>

35 添加網(wǎng)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 onLoad='placeHolder.close()'>
9: <p>This is the main page</p>
10: </body>
11: </html>

JavaScript就這么回事3：圖像

36 讀取圖像屬性

1: <img src="/”image1.jpg"” name=”myImage”>
2: <a href=”# ” onClick=”window.alert(document.myImage.width)”>Width</a>
3:

37 動態(tài)加載圖像

1: <script language=”JavaScript”>
2: myImage = new Image;
3: myImage.src = “Tellers1.jpg”;
4: </script>

38 簡單的圖像替換

1: <script language=”JavaScript”>
2: rollImage = new Image;
3: rollImage.src = “rollImage1.jpg”;
4: defaultImage = new Image;
5: defaultImage.src = “image1.jpg”;
6: </script>
7: <a href="/”myUrl"” onMouseOver=”document.myImage.src = rollImage.src;”
8: onMouseOut=”document.myImage.src = defaultImage.src;”>
9: <img src="/”image1.jpg"” name=”myImage” width=100 height=100 border=0>

39 隨機顯示圖像

1: <script language=”JavaScript”>
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(‘<img src=”' + imageList[imageChoice] + ‘“>');
9: </script>

40 函數(shù)實現(xiàn)的圖像替換

1: <script language=”JavaScript”>
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: </script>
14: <a href=”#” onMouseOver=”document.myImage1.src = rollImage1[replacement].src;”
15: onMouseOut=”document.myImage1.src = rollImage1[source].src;”>
16: <img src="/”image1.jpg"” width=100 name=”myImage1” border=0>
17: </a>

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