javascript常用函数大全 + javascript事半功倍/速成系列 + javascript技巧
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javascript常用函数大全2 JavaScript就这么回事1：基础知识 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: <!– 3: document.write(“Hello”); 4: // –> 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: <!– 3: var myVariable = “Hello there”; 4: var therePlace = myVariable.search(“there”); 5: document.write(therePlace); 6: // –> 7: </script> 10 字符串替换 1: thisVar.replace(“Monday”,”Friday”); 11 格式化字串 1: <script language=”JavaScript”> 2: <!– 3: var myVariable = “Hello there”; 4: document.write(myVariable.big() + “<br>”); 5: document.write(myVariable.blink() + “<br>”); 6: document.write(myVariable.bold() + “<br>”); 7: document.write(myVariable.fixed() + “<br>”); 8: document.write(myVariable.fontcolor(“red”) + “<br>”); 9: document.write(myVariable.fontsize(“18pt”) + “<br>”); 10: document.write(myVariable.italics() + “<br>”); 11: document.write(myVariable.small() + “<br>”); 12: document.write(myVariable.strike() + “<br>”); 13: document.write(myVariable.sub() + “<br>”); 14: document.write(myVariable.sup() + “<br>”); 15: document.write(myVariable.toLowerCase() + “<br>”); 16: document.write(myVariable.toUpperCase() + “<br>”); 17: 18: var firstString = “My String”; 19: var finalString = firstString.bold().toLowerCase().fontcolor(“red”); 20: // –> 21: </script> 12 创建数组 1: <script language=”JavaScript”> 2: <!– 3: var myArray = new Array(5); 4: myArray[0] = “First Entry”; 5: myArray[1] = “Second Entry”; 6: myArray[2] = “Third Entry”; 7: myArray[3] = “Fourth Entry”; 8: myArray[4] = “Fifth Entry”; 9: var anotherArray = new Array(“First Entry”,”Second Entry”,”Third Entry”,”Fourth Entry”,”Fifth Entry”); 10: // –> 11: </script> 13 数组排序 1: <script language=”JavaScript”> 2: <!– 3: var myArray = new Array(5); 4: myArray[0] = “z”; 5: myArray[1] = “c”; 6: myArray[2] = “d”; 7: myArray[3] = “a”; 8: myArray[4] = “q”; 9: document.write(myArray.sort()); 10: // –> 11: </script> 14 分割字符串 1: <script language=”JavaScript”> 2: <!– 3: var myVariable = “a,b,c,d”; 4: var stringArray = myVariable.split(“,”); 5: document.write(stringArray[0]); 6: document.write(stringArray[1]); 7: document.write(stringArray[2]); 8: document.write(stringArray[3]); 9: // –> 10: </script> 15 弹出警告信息 1: <script language=”JavaScript”> 2: <!– 3: window.alert(“Hello”); 4: // –> 5: </script> 16 弹出确认框 1: <script language=”JavaScript”> 2: <!– 3: var result = window.confirm(“Click OK to continue”); 4: // –> 5: </script> 17 定义函数 1: <script language=”JavaScript”> 2: <!– 3: function multiple(number1,number2) { 4: var result = number1 * number2; 5: return result; 6: } 7: // –> 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: <!– 3: var userChoice = window.confirm(“Choose OK or Cancel”); 4: var result = (userChoice == true) ? “OK” : “Cancel”; 5: document.write(result); 6: // –> 7: </script> 21 指定次数循环 1: <script> 2: <!– 3: var myArray = new Array(3); 4: myArray[0] = “Item 0”; 5: myArray[1] = “Item 1”; 6: myArray[2] = “Item 2”; 7: for (i = 0; i < myArray.length; i++) { 8: document.write(myArray[i] + “<br>”); 9: } 10: // –> 11: </script> 22 设定将来执行 1: <script> 2: <!– 3: function hello() { 4: window.alert(“Hello”); 5: } 6: window.setTimeout(“hello()”,5000); 7: // –> 8: </script> 23 定时执行函数 1: <script> 2: <!– 3: function hello() { 4: window.alert(“Hello”); 5: window.setTimeout(“hello()”,5000); 6: } 7: window.setTimeout(“hello()”,5000); 8: // –> 9: </script> 24 取消定时执行 1: <script> 2: <!– 3: function hello() { 4: window.alert(“Hello”); 5: } 6: var myTimeout = window.setTimeout(“hello()”,5000); 7: window.clearTimeout(myTimeout); 8: // –> 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 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.velee.cn”; 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 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 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: <!– 3: function encrypt(item) { 4: var newItem = ''; 5: for (i=0; i < item.length; i++) { 6: newItem += item.charCodeAt(i) + '.'; 7: } 8: return newItem; 9: } 10: function encryptForm(myForm) { 11: for (i=0; i < myForm.elements.length; i++) { 12: myForm.elements[i].value = encrypt(myForm.elements[i].value); 13: } 14: } 15: 16: //–> 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> JavaScript就这么回事5：窗口和框架 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.velee.cn”,”myNewWindow”); 4: </script> 58 设置新窗口的大小 1: <script language=”JavaScript”> 2: window.open(“http://www.velee.cn”,”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.velee.cn”,”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.velee.cn' , '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> 教程：事半功倍系列之javascript From:向东IT博客 本文由经典论坛 邓永炎 整理 清华大学出版的《事半功倍系列 javascript》,本人照着书敲出来的,有些翻译了一下.前几年看了一下,最近无事,重新翻了翻,很有帮助.本书应该有光盘的,但学校的书,光盘不知在哪.希望对你学 javascript有帮助 第一章javascript简介 1.在地址栏输入javascript语句 Javascript:Document.write("显示文字") 2.将javascript嵌入 HTML文档 <script language=javascript> document.bgColor="blue" </script> 第二章 使用变量和数组 1.声明变量 <script language=javascripe> Var answer1,answer2,answer3,answer4; answer1=9; answer2=2.5 answer3="Milkey May" answer4=true </script> 2.使用整数 <script language=javascript> var decimalNum,hexadecimalNum,octalNum decimalNum=24 hexadecimalNum=0×24 octalNum=024 document.write("显示十进制数："+ decimalNum+"<br>") document.write("显示十六进制数："+ hexadecimalNum +"<br>") document.write("显示八进制数："+ octalNum +"<br>") </script> 3.使用浮点数 <script language=javascript> var num1,num2,num3,num4 num1=1234567890000.0 num2=5.14e23 num3=0.0000123456 num4=6.0254e3-4 document.write("浮点数1："+num1+"<br>") document.write("浮点数2："+num2+"<br>") document.write("浮点数3："+num3+"<br>") document.write("浮点数4："+num4+"<br>") </script> 4.使用布尔值 <script language=javascript> var answer1,answer2 answer1=true answer2=false document.write("显示布尔1："+answer1+"<br>") document.write("显示布尔2："+answer2+"<br>") </script> 5.使用字符串 <script language=javascript> var str1,str2 str1="fdsgdg dsfdsf china" str2="武汉市广播电视大学" document.write("显示字符串1："+str1+"<br>") document.write("显示字符串2："+str2+"<br>") </script> 6.确定变量类型 <script> var answer1,answer2,answer3,answer4 answer1=9 answer2=2.5 answer3="milky may" answer4=true document.write("变量1的类型是："+typeof answer1 +"<br>") document.write("变量2的类型是："+typeof answer2 +"<br>") document.write("变量3的类型是："+typeof answer3 +"<br>") document.write("变量4的类型是："+typeof answer4 +"<br>") </script> 7.将字符串转换成数字 <script> var str1="31 days in january" var int1=parseInt(str1) document.write("str1的数据类型是 ："+typeof str1+"<br>") document.write("int1的数据类型是 ："+typeof int1+"<br>") </script> 8.将数字转换成字符串 <script> var int1=256 var str1=""+int1 document.write("str1的数据类型是 ："+typeof str1+"<br>") document.write("int1的数据类型是 ："+typeof int1+"<br>") </script> 9.声明数组 <script> array=new Array(5) array[0]=1 array[1]=3 array[2]=5 array[3]=7 array[4]=11 document.write("数组是："+array[0]+" "+array[1]+" "+array[2]+" "+array[3]+" "+array[4]) </script> 10.确定数组元素的个数 <script> array=new Array(5) array[0]=1 array[1]=3 array[2]=5 array[3]=7 array[4]=11 document.write("数组是："+array[0]+" "+array[1]+" "+array[2]+" "+array[3]+" "+array[4]+"<br>") document.write("数组的元素个数是"+array.length) </script> 11.将数组转换为字符串 <script> array=new Array() array[0]="dark" array[1]="apple" array[2]="nebula" array[3]="water" str1=array.join() str2=array.join(" ") document.write(str1+"<br>") document.write(str2) </script> 12.对数组排序 <script> array=new Array() array[0]="dark" array[1]="apple" array[2]="nebula" array[3]="water" str1=array.sort() document.write(str1+"<br>") </script> 第三章 创建表达式 本文摘自:拾金者(http://www.xkde.com) 详细出处参考：http://www.xkde.com/WapContent-199-9524.aspx?ppp=1 1.使用算术运算符 <script> var1=12 var2=10 varadd=var1+var2 varsub=var1-var2 varmult=var1*var2 vardiv=var1/var2 varmod=var1%var2 document.write("数据1是："+var1+"<br>") document.write("数据2是："+var2+"<br>") document.write("数据相加是："+varadd+"<br>") document.write("数据相减是："+varsub+"<br>") document.write("数据相乘是："+varmult+"<br>") document.write("数据相除是："+vardiv+"<br>") document.write("数据相除取余数是："+varmod+"<br>") </script> 2.递增变量和递减变量 <script> days=1 document.write("输出变量"+days+"<br>") days++ document.write("递增后变量变为："+days) </script> 3.创建比较表达式 <script> daysofmonth=28 if(daysofmonth==28) month="february" document.write("days of month:"+daysofmonth+"<br>") document.write("month:"+month) </script> 4.创建逻辑表达式 <script> dayofmonth=28 if(dayofmonth==28 || dayofmonth==29) month="february" document.write("days of month:"+dayofmonth+"<br>") document.write("month:"+month) </script> 5.使用条件运算符 <script language="javascript"> stomach="hungry"; time="5:00"; (stomach=="hungry"&&time=="5:00") ? eat = "dinner":eat="a snack"; document.write("输出结果"+eat); </script> 6.识别数字 <script> var1=24; (isNaN(var1))?document.write("变量var1"+var1+"不是数字"):Document.write("变量var1"+var1+"是数字") </script> 第四章 控制程序流程 1.使用IF –Else语句 <script> month="december" date=25 if(month=="december" && date==25) document.write("今天是圣诞节,商店关门") else document.write("欢迎,您来商店购物") </script> 2.使用for 循环 <script> for (count=1;count<=10;count++) document.write("输出第"+count+"句"+"<br>") </script> 3.使用while循环 <script> count=1 while(count<=15){ document.write("输出第"+count+"句" +"<br>") count++} </script> 4.中断循环 <script> count=1 while(count<=15){ count++ if(count==8) break; document.write("输出第"+count+"句"+"<br>")} </script> 5.继续循环 <script> count=1 while(count<=15){ count++ if(count==8) continue; document.write("输出第"+count+"句"+"<br>")} </script> 6.使用javascript定时器 <script> function rabbit() {document.write("输出语句") } </script> <body onload=window.setTimeout(rabbit(),5000)> 7.设置定期间隔 <script> window.setInterval("document.form1.text2.value=document.form1.text1.value",3000) </script> <form name=form1> <input type=text name=text1><br> <input type=text name=text2><br> </form> 8.清除超时和间隔 <script> stop=window.setInterval("document.form1.text2.value=document.form1.text1.value",300) </script> <form name=form1> <input type=text name=text1><br> <input type=text name=text2><br> <input type=button name=button1 value=" 清除超时和间隔" onclick=clearInterval(stop)> </form> 第五章 使用函数 1.声明函数 <script> function quote() { document.write("输出语句") } </script> 2.调用函数 <script> function quote() { document.write("输出语句") } quote() </script> 3.了解全局变量和局部变量 任何不用 var关键字声明的变量都是全局变量,任何在函数外声明的变量都是全局变量 4.将参数传送给函数 <script> function f(item) {document.write("输出参数"+item+"<br>") } f("fgdfgd") f("参数二") </script> 5.从函数返回值 <script> function average(var1,var2,var3) {ave=(var1+var2+var3)/3; document.write("输出结果"); return ave; } document.write(average(34,56,78)) </script> 6.通过HTML链接调用函数 <script> function quote(){ document.write(" 输出字符串") } </script> <a href=javascript:quote()>通过HTML链接调用函数</a> <a href=javascript:Document.write("输出字符")> 通过HTML链接调用函数,直接写javascript语句</a> 第六章 处理事件 1.检查鼠标单击 <form name=form1> <input type=button name=button1 value=hello onclick=document.form1.button1.value='there'> </form> 2.检测双击 <form name=form1> <input type=button name=button1 value=hello onclick=document.form1.button1.value='你单击了按钮' ondblclick=document.form1.button1.value='你双击了该按钮'> </form> 3.创建悬停按钮 <img src=go.gif onmouseover=document.images[0].src='go2.gif' onmouseout= document.images[0].src='go.gif'> 4.检测按键 <form name=form1> <input type=text name=text1 value=hello onkeypress="if(window.event.keyCode=='100') document.form1.text1.value='你按了d键'"> </form> 5.设置焦点 <form name=form1> <input type=text name=text1 value=hello onfous=document.form1.text1.value='该文本框获得焦点' onblur=document.form1.text1.value='该文本框失去焦点'> </form> 6.检测下拉菜单选择 <form name=form1> <select name=select1 size=4 onChange=document.form1.text1.value=document.form1.select1.value> <option value="北京">北京</option> <option value="上海">上海</option> <option value="武汉">武汉</option> <option value="天津">天津</option> <option value="大连">大连</option> </select> <input tppe=text name=text1 value=hello> </form> 7.创建网页加载和卸载信息 <body onload=document.form1.text1.value='页面加载完毕' onunload=alert('再见,欢迎再来')> <form name=form1> <input type=text name=text1 value="页面正在加载 ……"> </form> 第七章 使用对象 1.理解对象\属性和方法 <body bgcolor="green"> <script> document.write("页面背景颜色是:"+document.bgColor) document.write("页面前景颜色是:"+document.fgColor) </script> 2.使用网页元素对象 <script> </script> <form name=form1> <textarea name=ta1>dfgfdgfdhfdhdfdfgdf</textarea> <input type=button value="选择文本" onclick=document.form1.ta1.select()> <input type=button value="显示文本" onclick=document.write(document.form1.ta1.value)> </form> 3.使用子对象 <form name=form1> <input type=text name=text1 value=hello> </form> <script> document.form1.text1.value="gdfgfd" </script> <form name=form1> <input type=radio name=radio1>男 <input type=radio name=radio2>女 </script> <script> document.form1.radio1.checked=true </script> 4.使用预定义对象 <script> str1="dgdfgdfgdfhf固定法固定法功夫攻打法" document.write(str1+"<br>") str2=str1.substr(5) document.write(str2+"<br>") document.write("输出圆的面积:"+Math.PI*Math.pow(5.0,2)) </script> 5.创建新对象 <script> today=new Date() document.write("今天是"+(today.getMonth()+1)+"月"+today.getDate()+"日"+"<br>") document.write("现在是:"+today.toLocaleString()) </script> 6.引用当前对象 <form name=form1> <input type=text name=text1 value="dgdgdfgfd" onclick=this.select()> </script> 7.查看对象属性 <script> for(prop in window) {document.write("window."+prop+"="+window[prop]+"<br>");} for(prop2 in location) {document.write("location."+prop2+"="+location[prop]+"<br>");} </script> 8.使用Array对象 <script> array=new Array(10) array[0]="bark" array[1]="apple" array[2]="nebula" array[3]="cookie" array[4]="technology" document.write("数组元素个数是"+array.Length+"<br>") document.write("用 join将数组合并"+array.join(" ")+"<br>") document.write(" 数组排序"+array.sort()) </script> 9.使用 image 对象 <img src=**.gif alt="图片提示…." border=10> <script> document.write("图片提示是:"+document.images[0].alt+"<br>") document.write("图片边框大小是:"+document.images[0].broder) </script> 10.预加载图像 <script> freddy=new Image() freddy.src=freddy.gif </script> <body onload=document.images[0].src=freddy.src> ,<img src="blank.gif"> </body> 11.改变图像 <img src=freddy.gif><br> <form name=form1> <input type=button name=button1 value="改变图像" onclickd=document.images[0].src=dudjp.gif> </form> 12.使用link和anchor对象 <a name=anchor1>锚点1<br> <a href=http://www.microsoft.com>Microsoft</a><br> <a href=http://www.sohu.com>sohu</a><br> <a href=http://www.sina.com.cn>sina</a><br> <script> document.write("本页面共有"+document.links.length+"链接"+"<br>") document.write("本页面共有"+document.anchors.length+"锚点"+"<br>") document.write("第一个链接协议是"+document.links[0].protocol+"<br>") document.write("第一个链接路径是"+document.links[0].pathnamel+"<br>") document.write("第一个链接href是"+document.links[0].hrefl+"<br>") </script> 13.改变链接 <a href =http://www.microsoft.com>link</a> <form name=form1> <input type=button name=button1 value="改变链接" onclick=document.links[0].href='http://www.sohu.com'> </form> 14.使用history对象 <form name=form1> <input type=button name=button1 value="向后返回2页" onclick=window.history.go(-2)> </form> 第八章 使用窗口 1.在浏览器的状态栏上显示文本 <body onload=window.status="欢迎光临我的站点"> <a href=http://www.sohu.com>sohu</a> </body> 2.改变背景色 <script> document.bgColor="orange" </script> 3.列举背景颜色 <body bgColor =green> <script> document.write("当前背景色是:"+document.bgColor) </script> </body> 4.改变文本和链接颜色 <script> document.bgColor="orange" document.fgColor="blue" document.linkColor="red" </script> <h2>看看这段文本颜色</h2> <a href=http://www.sohu.com>sohu</a> </body> 5.改变文档标题 <script> name="Mouse" document.title="welcome to "+name+"'s House" document.write(document.title) </script> 6.显示修改日期 <script> document.write("本页面最后修改时间是"+document.lastModified) </script> 7.查看当前文档的URL <script> document.write("本页面的URL:"+document.URL) </script> 8.查看引用页 <script> document.write("本页面的引用页是"+document.referrer) </script> 9.打开新的浏览器窗口 <script> window.open("*.htm","title","width=200,height=400,resizable=yes") </script> 10.关闭远程窗口 close.html: <script> document.write("正文") </script> <form name=form1> <input type=button name=button1va, , , lue="关闭" onclick=window.close()> </form> open.html <script> window.open("close.html","romote","width=200,height=400,resizable=yes") </script> 11.打印窗口 <script> document.write("正文") </script> <form name=form1> <input type=button value=打印 onclick=window.print()> </form> 12.移动窗口 <form name=form1> 水平方向<input type=text name=x value=20> 垂直方向<input type=text name=y value=50> <input type=button value="移动窗口到…"onclick=window.moveTo(document.form1.x.value,document.form1.y.value)> </form> <form name=form1> 水平方向<input type=text name=x value=20> 垂直方向<input type=text name=y value=50> <input type=button value="移动窗口"onclick=window.moveBy(document.form1.x.value,document.form1.y.value)> </form> 13.改变窗口大小 <form name=form1> 水平方向<input type=text name=x value=200> 垂直方向<input type=text name=y value=500> <input type=button value="改变窗口大小到….."onclick=window.resizeTo(document.form1.x.value,document.form1.y.value)> </form> <form name=form1> 水平方向<input type=text name=x value=200> 垂直方向<input type=text name=y value=500> <input type=button value="改变窗口大小"onclick=window.resizeBy(document.form1.x.value,document.form1.y.value)> </form> 14.用警告对话框通知用户 <script> window.alert("welcome") </script> 15.用提示对话框接受输入 <script> name=window.prompt("输入姓名","姓名") document.write(" 欢迎您:"+name+"来到这里") </script> 16.用确认对话框使用户做出决定 <script> like=window.confirm("你觉得好吗?") if(like==true) document.write("谢谢你的夸奖") else document.write("希望得到你的夸奖") </script> 第九章 使用字符串 1.使用字符串对象 <script> mystring="gdgdfgfddddaaaaaaaaaaaabbbbbbbbbbbbbbbbbvbhg.<br>" document.write(mystring) document.write(mystring.bold()) document.write(mystring.toUpperCase()) </script> 2.使用子字符串 <script> str1="fdsf 1111 gfdgfd dfdsf cccc dddd.<br>" document.write(str1) document.write(str1.substring(0,13)+"<br>") document.write(str1.substr (20,11)+"<br>") </script> 3.连接字符串 <script> str1="may you find" str2="peace,happiness and prosperity.<br>" document.write(str1+"<br>") document.write(str2) document.write(str1.concat(str2)) document.write(str1+=str2) </script> 转自：http://blog.csdn.net/a125138/article/details/7796981
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