（转载）javascript转自世纪流年blog

（转载）javascript转自世纪流年blog

（转载）http://www.cnblogs.com/tfe/articles/164205.html

础知识

2005年5月2日22:25星期一 [ Dhtml ]

有些时候你精通一门语言，但是会发现你其实整天在和其它语言打交道，也许你以为这些微不足道，不至于影响你的开发进度，但恰恰是这些你不重视的东西会浪费你很多时间，我一直以为我早在几年前就已经精通JavaScript了，直到目前，我才越来越觉得JavaScript远比我想象的复杂和强大，我开始崇拜它，就像崇拜所有OOP语言一样～
趁着节日的空隙，把有关JavaScript的方法和技巧整理下，让每个在为JavaScript而烦恼的人明白，JavaScript就这么回事！并希望JavaScript还可以成为你的朋友，让你豁然开朗，在项目中更好的应用～

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

1 创建脚本块

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

2 隐藏脚本代码

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

在不支持JavaScript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-JavaScript browser. 3: </noscript>

4 链接外部脚本文件

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

10 字符串替换

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

11 格式化字串

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

12 创建数组

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

13 数组排序

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

14 分割字符串

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

15 弹出警告信息

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

16 弹出确认框

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

17 定义函数

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

18 调用JS函数

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

JavaScript就这么回事2：浏览器输出

2005年5月2日23:05星期一 [ Dhtml ]

26 访问document对象

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

27 动态输出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 输出换行

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

29 输出日期

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

30 指定日期的时区

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 设置日期输出格式

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 读取URL参数

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>

你还以为HTML是无状态的么？

33 打开一个新的document对象

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 页面跳转

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

35 添加网页加载进度窗口

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就这么回事3：图像

2005年5月2日23:34星期一 [ Dhtml ]

36 读取图像属性

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

37 动态加载图像

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

38 简单的图像替换

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 随机显示图像

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 函数实现的图像替换

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>

41 创建幻灯片

1: <script language=”JavaScript”> 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: </script> 19: </head> 20: <body onLoad=”slideShow(0)”> 21: <img src=”image1.jpg” width=100 name=”slideShow”>

42 随机广告图片

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 urlList = new Array; 8: urlList[0] = “http://some.host/”; 9: urlList[1] = “http://another.host/”; 10: urlList[2] = “http://somewhere.else/”; 11: urlList[3] = “http://right.here/”; 12: var imageChoice = Math.floor(Math.random() * imageList.length); 13: document.write(‘<a href=”’ + urlList[imageChoice] + ‘“><img src=”’ + imageList[imageChoice] + ‘“></a>’); 14: </script>

JavaScript就这么回事4：表单

2005年5月17日22:33星期二 [ Dhtml ]

还是先继续写完JS就这么回事系列吧～
43 表单构成

1: <form method=”post” action=”target.html” name=”thisForm”> 2: <input type=”text” name=”myText”> 3: <select name=”mySelect”> 4: <option value=”1”>First Choice</option> 5: <option value=”2”>Second Choice</option> 6: </select> 7: <br> 8: <input type=”submit” value=”Submit Me”> 9: </form>

44 访问表单中的文本框内容

1: <form name=”myForm”> 2: <input type=”text” name=”myText”> 3: </form> 4: <a href='#' onClick='window.alert(document.myForm.myText.value);'>Check Text Field</a>

45 动态复制文本框内容

1: <form name=”myForm”> 2: Enter some Text: <input type=”text” name=”myText”><br> 3: Copy Text: <input type=”text” name=”copyText”> 4: </form> 5: <a href=”#” onClick=”document.myForm.copyText.value = 6: document.myForm.myText.value;”>Copy Text Field</a>

46 侦测文本框的变化

1: <form name=”myForm”> 2: Enter some Text: <input type=”text” name=”myText” onChange=”alert(this.value);”> 3: </form>

47 访问选中的Select

1: <form name=”myForm”> 2: <select name=”mySelect”> 3: <option value=”First Choice”>1</option> 4: <option value=”Second Choice”>2</option> 5: <option value=”Third Choice”>3</option> 6: </select> 7: </form> 8: <a href='#' onClick='alert(document.myForm.mySelect.value);'>Check Selection List</a>

48 动态增加Select项

1: <form name=”myForm”> 2: <select name=”mySelect”> 3: <option value=”First Choice”>1</option> 4: <option value=”Second Choice”>2</option> 5: </select> 6: </form> 7: <script language=”JavaScript”> 8: document.myForm.mySelect.length++; 9: document.myForm.mySelect.options[document.myForm.mySelect.length - 1].text = “3”; 10: document.myForm.mySelect.options[document.myForm.mySelect.length - 1].value = “Third Choice”; 11: </script>

49 验证表单字段

1: <script language=”JavaScript”> 2: function checkField(field) { 3: if (field.value == “”) { 4: window.alert(“You must enter a value in the field”); 5: field.focus(); 6: } 7: } 8: </script> 9: <form name=”myForm” action=”target.html”> 10: Text Field: <input type=”text” name=”myField”onBlur=”checkField(this)”> 11: <br><input type=”submit”> 12: </form>

50 验证Select项

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: <form name=”myForm” action=”login.html”> 2: Username: <input type=”text” name=”username”><br> 3: Password: <input type=”password” name=”password”><br> 4: <input type=”button” value=”Login” onClick=”this.form.submit();”> 5: <input type=”button” value=”Register” onClick=”this.form.action = ‘register.html’; this.form.submit();”> 6: <input type=”button” value=”Retrieve Password” onClick=”this.form.action = ‘password.html’; this.form.submit();”> 7: </form>

52 使用图像按钮

1: <form name=”myForm” action=”login.html”> 2: Username: <input type=”text” name=”username”><br> 3: Password: <input type=”password”name=”password”><br> 4: <input type=”image” src=”login.gif” value=”Login”> 5: </form> 6:

53 表单数据的加密

1: <SCRIPT LANGUAGE='JavaScript'> 2:  17: </SCRIPT> 18: <form name='myForm' onSubmit='encryptForm(this); window.alert(this.myField.value);'> 19: Enter Some Text: <input type=text name=myField><input type=submit> 20: </form>

上面的encryptForm方法把表单中的数据转换为编码，在提交表单之前完成了简单的表单数据加密～

JavaScript就这么回事5：窗口和框架

2005年5月17日23:16星期二 [ Dhtml ]

54 改变浏览器状态栏文字提示

1: <script language=”JavaScript”> 2: window.status = “A new status message”; 3: </script>

55 弹出确认提示框

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

56 提示输入

1: <script language=”JavaScript”> 2: var userName = window.prompt(“Please Enter Your Name”,”Enter Your Name Here”); 3: document.write(“Your Name is “ + userName); 4: </script>

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: <script language=”JavaScript”> 3: window.open(“http://www.liu21st.com/”,”myNewWindow”); 4: </script>

58 设置新窗口的大小

1: <script language=”JavaScript”> 2: window.open(“http://www.liu21st.com/”,”myNewWindow”,'height=300,width=300'); 3: </script>

59 设置新窗口的位置

1: <script language=”JavaScript”> 2: window.open(“http://www.liu21st.com/”,”myNewWindow”,'height=300,width=300,left=200,screenX=200,top=100,screenY=100'); 3: </script>

60 是否显示工具栏和滚动栏

1: <script language=”JavaScript”> 2: window.open(“http:

61 是否可以缩放新窗口的大小

1: <script language=”JavaScript”> 2: window.open('http://www.liu21st.com/' , 'myNewWindow', 'resizable=yes' );</script>

62 加载一个新的文档到当前窗口

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

63 设置页面的滚动位置

1: <script language=”JavaScript”> 2: if (document.all) { //如果是IE浏览器则使用scrollTop属性 3: document.body.scrollTop = 200; 4: } else { //如果是NetScape浏览器则使用pageYOffset属性 5: window.pageYOffset = 200; 6: }</script>

64 在IE中打开全屏窗口

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

65 新窗口和父窗口的操作

1: <script language=”JavaScript”> 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=”JavaScript”> 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=”JavaScript”> 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>
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原文地址：https://www.cnblogs.com/Robotke1/p/3264874.html

（转载）javascript转自世纪流年blog

2005年5月2日22:25星期一 [ Dhtml ]

2005年5月2日23:05星期一 [ Dhtml ]

2005年5月2日23:34星期一 [ Dhtml ]

2005年5月17日22:33星期二 [ Dhtml ]

2005年5月17日23:16星期二 [ Dhtml ]