JavaScript實作功能全集

适合閱讀範圍：對JavaScript一無所知～離精通隻差一步之遙的人

JavaScript就這麼回事1：基礎知識

1 建立腳本塊

JavaScript code goes here

</script>

2 隐藏腳本代碼

<!--

document.write("Hello");

// -->

</script>

3 在不支援JavaScript的浏覽器中将不執行相關代碼,浏覽器不支援的時候顯示

Hello to the non-JavaScript browser.

</noscript>

4 連結外部腳本檔案

5 注釋腳本

// This is a comment

document.write("Hello"); // This is a comment

6 輸出到浏覽器

document.write("<strong>Hello</strong>");

7 定義變量

var myVariable = "some value";

8 字元串相加

var myString = "String1" + "String2";

9 字元串搜尋

<!--

var myVariable = "Hello there";

var therePlace = myVariable.search("there");

document.write(therePlace);

// -->

</script>

10 字元串替換

thisVar.replace("Monday","Friday");

11 格式化字串

<!--

var myVariable = "Hello there";

document.write(myVariable.big() + "<br>");

document.write(myVariable.blink() + "<br>");

document.write(myVariable.bold() + "<br>");

document.write(myVariable.fixed() + "<br>");

document.write(myVariable.fontcolor("red") + "<br>");

document.write(myVariable.fontsize("18pt") + "<br>");

document.write(myVariable.italics() + "<br>");

document.write(myVariable.small() + "<br>");

document.write(myVariable.strike() + "<br>");

document.write(myVariable.sub() + "<br>");

document.write(myVariable.sup() + "<br>");

document.write(myVariable.toLowerCase() + "<br>");

document.write(myVariable.toUpperCase() + "<br>");

var firstString = "My String";

var finalString = firstString.bold().toLowerCase().fontcolor("red");

// -->

</script>

12 建立數組

<!--

var myArray = new Array(4);

myArray[0] = "First Entry";

myArray[1] = "Second Entry";

myArray[2] = "Third Entry";

myArray[3] = "Fourth Entry";

var anotherArray = new Array("First Entry","Second Entry","Third Entry","Fourth Entry");

// -->

</script>

13 數組排序

<!--

var myArray = new Array(4);

myArray[0] = "z";

myArray[1] = "c";

myArray[2] = "d";

myArray[3] = "a";

document.write(myArray.sort());

// -->

</script>

14 分割字元串

<!--

var myVariable = "a,b,c,d";

var stringArray = myVariable.split(",");

document.write(stringArray[0]);

document.write(stringArray[1]);

document.write(stringArray[2]);

document.write(stringArray[3]);

// -->

</script>

15 彈出警告資訊

<!--

window.alert("Hello");

// -->

</script>

16 彈出确認框

<!--

var result = window.confirm("Click OK to continue");

// -->

</script>

17 定義函數

<!--

function multiple(number1,number2) {

var result = number1 * number2;

return result;

}

// -->

</script>

18 調用JS函數

19 在頁面加載完成後執行函數

Body of the page

</body>

20 條件判斷

<!--

var userChoice = window.confirm("Choose OK or Cancel");

var result = (userChoice == true) ? "OK" : "Cancel";

document.write(result);

// -->

</script>

21 指定次數循環

<!--

var myArray = new Array(3);

myArray[0] = "Item 0";

myArray[1] = "Item 1";

myArray[2] = "Item 2";

for (i = 0; i < myArray.length; i++) {

document.write(myArray + "<br>");

}

// -->

</script>

22 設定将來執行,延時5秒

<!--

function hello() {

window.alert("Hello");

}

window.setTimeout("hello()",5000);

// -->

</script>

23 定時執行函數

<!--

function hello() {

window.alert("Hello");

window.setTimeout("hello()",5000);

}

hello();

// -->

</script>

24 取消定時執行

<!--

function hello() {

window.alert("Hello");

}

var myTimeout = window.setTimeout("hello()",5000);

window.clearTimeout(myTimeout);

// -->

</script>

25 在頁面解除安裝時候執行函數

Body of the page

</body>

avaScript就這麼回事2：浏覽器輸出

26 通路document對象

var myURL = document.URL;

window.alert(myURL);

</script>

27 動态輸出HTML

document.write("<p>Here's some information about this document:</p>");

document.write("<ul>");

document.write("<li>Referring Document: " + document.referrer + "</li>");

document.write("<li>Domain: " + document.domain + "</li>");

document.write("<li>URL: " + document.URL + "</li>");

document.write("</ul>");

</script>

28 輸出換行

document.writeln("<strong>a</strong>");

document.writeln("b");

29 輸出日期

var thisDate = new Date();

document.write(thisDate.toString());

</script>

30 指定日期的時區

var myOffset = -2;

var currentDate = new Date();

var userOffset = currentDate.getTimezoneOffset()/60;

var timeZoneDifference = userOffset - myOffset;

currentDate.setHours(currentDate.getHours() + timeZoneDifference);

document.write("The time and date in Central Europe is: " + currentDate.toLocaleString());

</script>

31 設定日期輸出格式

var thisDate = new Date();

var thisTimeString = thisDate.getHours() + ":" + thisDate.getMinutes();

var thisDateString = thisDate.getFullYear() + "/" + thisDate.getMonth() + "/" + thisDate.getDate();

document.write(thisTimeString + " on " + thisDateString);

</script>

32 讀取URL參數，你還以為HTML是無狀态的麼？

var urlParts = document.URL.split("?");

var parameterParts = urlParts[1].split("&");

for (i = 0; i < parameterParts.length; i++) {

var pairParts = parameterParts.split("=");

var pairName = pairParts[0];

var pairValue = pairParts[1];

document.write(pairName + " ：" +pairValue );

}

</script>

33 打開一個新的document對象

function newDocument() {

document.open();

document.write("<p>This is a New Document.</p>");

document.close();

}

</script>

34 頁面跳轉

window.location = " http://www.liu21st.com/";

</script>

35 添加網頁加載進度視窗

<html>

<head>

var placeHolder = window.open('holder.html','placeholder','width=200,height=200');

</script>

</head>

</body>

</html>

avaScript就這麼回事3：圖像

36 讀取圖像屬性

37 動态加載圖像

myImage = new Image;

myImage.src = "Tellers1.jpg";

</script>

38 簡單的圖像替換

rollImage = new Image;

rollImage.src = "rollImage1.jpg";

defaultImage = new Image;

defaultImage.src = "image1.jpg";

</script>

<a href="/" target="_blank" rel="external nofollow" myUrl"" onMouseOver="document.myImage.src = rollImage.src;"

onMouseOut="document.myImage.src = defaultImage.src;">

39 随機顯示圖像

var imageList = new Array;

imageList[0] = "image1.jpg";

imageList[1] = "image2.jpg";

imageList[2] = "image3.jpg";

imageList[3] = "image4.jpg";

var imageChoice = Math.floor(Math.random() * imageList.length);

document.write(‘<img src="’ + imageList[imageChoice] + ‘">’);

</script>

40 函數實作的圖像替換

var source = 0;

var replacement = 1;

function createRollOver(originalImage,replacementImage) {

var imageArray = new Array;

imageArray[source] = new Image;

imageArray[source].src = originalImage;

imageArray[replacement] = new Image;

imageArray[replacement].src = replacementImage;

return imageArray;

}

var rollImage1 = createRollOver("image1.jpg","rollImage1.jpg");

</script>

onMouseOut="document.myImage1.src = rollImage1[source].src;">

</a>

41 建立幻燈片

var imageList = new Array;

imageList[0] = new Image;

imageList[0].src = "image1.jpg";

imageList[1] = new Image;

imageList[1].src = "image2.jpg";

imageList[2] = new Image;

imageList[2].src = "image3.jpg";

imageList[3] = new Image;

imageList[3].src = "image4.jpg";

function slideShow(imageNumber) {

document.slideShow.src = imageList[imageNumber].src;

imageNumber += 1;

if (imageNumber < imageList.length) {

window.setTimeout("slideShow(" + imageNumber + ")",3000);

}

</script>

</head>

20: <body onLoad="slideShow(0)">

2<img src="/"image1.jpg"" width=100 name="slideShow">

42 随機廣告圖檔

var imageList = new Array;

imageList[0] = "image1.jpg";

imageList[1] = "image2.jpg";

imageList[2] = "image3.jpg";

imageList[3] = "image4.jpg";

var urlList = new Array;

urlList[0] = " http://some.host/";

urlList[1] = " http://another.host/";

urlList[2] = " http://somewhere.else/";

urlList[3] = " http://right.here/";

var imageChoice = Math.floor(Math.random() * imageList.length);

document.write(‘<a href="’ + urlList[imageChoice] + ‘" target="_blank" rel="external nofollow" ><img src="’ + imageList[imageChoice] + ‘"></a>’);

</script>

avaScript就這麼回事4：表單

43 表單構成

<option value="1">First Choice</option>

<option value="2">Second Choice</option>

</select>

<br>

</form>

44 通路表單中的文本框内容

</form>

<a href='#' onClick='window.alert(document.myForm.myText.value);'>Check Text Field</a>

45 動态複制文本框内容

Enter some Text: <input type="text" name="myText"><br>

Copy Text: <input type="text" name="copyText">

</form>

document.myForm.myText.value;">Copy Text Field</a>

46 偵測文本框的變化

Enter some Text: <input type="text" name="myText" onChange="alert(this.value);">

</form>

47 通路選中的Select

</select>

</form>

<a href='#' onClick='alert(document.myForm.mySelect.value);'>Check Selection List</a>

48 動态增加Select項

</select>

</form>

document.myForm.mySelect.length++;

document.myForm.mySelect.options[document.myForm.mySelect.length - 1].text = "3";

document.myForm.mySelect.options[document.myForm.mySelect.length - 1].value = "Third Choice";

</script>

49 驗證表單字段

function checkField(field) {

if (field.value == "") {

window.alert("You must enter a value in the field");

field.focus();

}

</script>

Text Field: <input type="text" name="myField"onBlur="checkField(this)">

</form>

50 驗證Select項

function checkList(selection) {

if (selection.length == 0) {

window.alert("You must make a selection from the list.");

return false;

}

return true;

}

51 動态改變表單的action

Username: <input type="text" name="username"><br>

Password: <input type="password" name="password"><br>

</form>

52 使用圖像按鈕

Username: <input type="text" name="username"><br>

Password: <input type="password"name="password"><br>

</form>

53 表單資料的加密

<!--

function encrypt(item) {

var newItem = '';

for (i=0; i < item.length; i++) {

newItem += item.charCodeAt(i) + '.';

}

return newItem;

}

function encryptForm(myForm) {

for (i=0; i < myForm.elements.length; i++) {

myForm.elements.value = encrypt(myForm.elements.value);

}

//-->

</SCRIPT>

Enter Some Text: <input type=text name=myField><input type=submit>

20: </form>

JavaScript就這麼回事5：視窗和架構

54 改變浏覽器狀态欄文字提示

window.status = "A new status message";

</script>

55 彈出确認提示框

var userChoice = window.confirm("Click OK or Cancel");

if (userChoice) {

document.write("You chose OK");

} else {

document.write("You chose Cancel");

}

</script>

56 提示輸入

var userName = window.prompt("Please Enter Your Name","Enter Your Name Here");

document.write("Your Name is " + userName);

</script>

57 打開一個新視窗

//打開一個名稱為myNewWindow的浏覽器新視窗

window.open(" http://www.liu21st.com/","myNewWindow");

</script>

58 設定新視窗的大小

window.open(" http://www.liu21st.com/","myNewWindow",'height=300,width=300');

</script>

59 設定新視窗的位置

window.open(" http://www.liu21st.com/","myNewWindow",'height=300,width=300,left=200,screenX=200,top=100,screenY=100');

</script>

60 是否顯示工具欄和卷軸框

window.open("http:

61 是否可以縮放新視窗的大小

window.open(' http://www.liu21st.com/' , 'myNewWindow', 'resizable=yes' );</script>

62 加載一個新的文檔到目前視窗

<a href='#' onClick='document.location = '125a.html';' >Open New Document</a>

63 設定頁面的滾動位置

if (document.all) { //如果是IE浏覽器則使用scrollTop屬性

document.body.scrollTop = 200;

} else { //如果是NetScape浏覽器則使用pageYOffset屬性

window.pageYOffset = 200;

}</script>

64 在IE中打開全屏視窗

<a href='#' onClick="window.open(' http://www.juxta.com/','newWindow','fullScreen=yes');">Open a full-screen window</a>

65 新視窗和父視窗的操作

//定義新視窗

var newWindow = window.open("128a.html","newWindow");

newWindow.close(); //在父視窗中關閉打開的新視窗

</script>

在新視窗中關閉父視窗

window.opener.close()

66 往新視窗中寫内容

var newWindow = window.open("","newWindow");

newWindow.document.open();

newWindow.document.write("This is a new window");

newWIndow.document.close();

</script>

67 加載頁面到架構頁面

</frameset>

在frame1中加載frame2中的頁面

parent.frame2.document.location = "135b.html";

68 在架構頁面之間共享腳本

如果在frame1中html檔案中有個腳本

function doAlert() {

window.alert("Frame 1 is loaded");

}

那麼在frame2中可以如此調用該方法

This is frame 2.

</body>

69 資料公用

可以在架構頁面定義資料項，使得該資料可以被多個架構中的頁面公用

var persistentVariable = "This is a persistent value";

</script>

</frameset>

這樣在frame1和frame2中都可以使用變量persistentVariable

70 架構代碼庫

根據以上的一些思路，我們可以使用一個隐藏的架構頁面來作為整個架構集的代碼庫

</frameset>

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