JavaScript就这么回事(JS基础知识整理).doc

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1 创建脚本块引用内容程序代码 <script language=”JavaScript”> JavaScript 代码写在这里面 </script> 2 隐藏脚本代码引用内容程序代码 <script language=”JavaScript”>  </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引用内容程序代码 <noscript> Hello to the non-JavaScript browser. </noscript> 4 链接外部脚本文件引用内容程序代码 <script language=”JavaScript” src="/”filename.js"”></script> 5 注释脚本引用内容程序代码 // This is a comment document.write(“Hello”); // This is a comment /* All of this is a comment */ 6 输出到浏览器引用内容程序代码 document.write(“<strong>Hello</strong>”); 7 定义变量引用内容程序代码 var myVariable = “some value”; 8 字符串相加引用内容程序代码 var myString = “String1” + “String2”; 9 字符串搜索引用内容程序代码 <script language=”JavaScript”>  </script> 10 字符串替换引用内容程序代码 thisVar.replace(“Monday”,”Friday”); 11 格式化字串引用内容程序代码 <script language=”JavaScript”>  </script> 12 创建数组引用内容程序代码 <script language=”JavaScript”>  </script> 13 数组排序引用内容程序代码 <script language=”JavaScript”>  </script> 14 分割字符串引用内容程序代码 <script language=”JavaScript”>  </script> 15 弹出警告信息引用内容程序代码 <script language=”JavaScript”>  </script> 16 弹出确认框引用内容程序代码 <script language=”JavaScript”>  </script> 17 自定义函数引用内容程序代码 <script language=”JavaScript”>  </script> 18 调用JS函数引用内容程序代码 <a href=”#” onClick=”functionName()”>Link text</a> <a href="/”javascript:functionName"()”>Link text</a> 19 在页面加载完成后执行函数引用内容程序代码 <body onLoad=”functionName();”> Body of the page </body> 20 条件判断引用内容程序代码 <script>  </script> 21 指定次数循环引用内容程序代码 <script>  </script> 22 设定将来执行引用内容程序代码 <script>  </script> 23 定时执行函数引用内容程序代码 <script>  </script> 24 取消定时执行引用内容程序代码 <script>  </script> 25 在页面卸载时候执行函数引用内容程序代码 <body onUnload=”functionName();”> Body of the page </body> JavaScript就这么回事2：浏览器输出 26 访问document对象引用内容程序代码 <script language=”JavaScript”> var myURL = document.URL; window.alert(myURL); </script> 27 动态输出HTML 引用内容程序代码 <script language=”JavaScript”> 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 输出换行引用内容程序代码 document.writeln(“<strong>a</strong>”); document.writeln(“b”); 29 输出日期引用内容程序代码 <script language=”JavaScript”> var thisDate = new Date(); document.write(thisDate.toString()); </script> 30 指定日期的时区引用内容程序代码 <script language=”JavaScript”> 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 设置日期输出格式引用内容程序代码 <script language=”JavaScript”> 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 读取URL参数引用内容程序代码 <script language=”JavaScript”> var urlParts = document.URL.split(“?”); var parameterParts = urlParts[1].split(“&”); for (i = 0; i < parameterParts.length; i++) { var pairParts = parameterParts[i].split(“=”); var pairName = pairParts[0]; var pairValue = pairParts[1]; document.write(pairName + “ ：“ +pairValue ); } </script> 你还以为HTML是无状态的么？ 33 打开一个新的document对象引用内容程序代码 <script language=”JavaScript”> function newDocument() { document.open(); document.write(“<p>This is a New Document.</p>”); document.close(); } </script> 34 页面跳转引用内容程序代码 <script language=”JavaScript”> window.location = “http://www.x- </script> 35 添加网页加载进度窗口引用内容程序代码 <html> <head> <script language='javaScript'> var placeHolder = window.open('holder.html','placeholder','width=200,height=200'); </script> <title>The Main Page</title> </head> <body onLoad='placeHolder.close()'> <p>This is the main page</p> </body> </html> JavaScript就这么回事3：图像 36 读取图像属性引用内容程序代码 <img src="/”image1.jpg"” name=”myImage”> <a href=”# ” onClick=”window.alert(document.myImage.width)”>Width</a> 37 动态加载图像引用内容程序代码 <script language=”JavaScript”> myImage = new Image; myImage.src = “Tellers1.jpg”; </script> 38 简单的图像替换引用内容程序代码 <script language=”JavaScript”> rollImage = new Image; rollImage.src = “rollImage1.jpg”; defaultImage = new Image; defaultImage.src = “image1.jpg”; </script> <a href="/”myUrl"” onMouseOver=”document.myImage.src = rollImage.src;” onMouseOut=”document.myImage.src = defaultImage.src;”> <img src="/”image1.jpg"” name=”myImage” width=100 height=100 border=0> 39 随机显示图像引用内容程序代码 <script language=”JavaScript”> 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 函数实现的图像替换引用内容程序代码 <script language=”JavaScript”> 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 rollImage = createRollOver(“image1.jpg”,”rollImage1.jpg”); </script> <a href=”#” onMouseOver=”document.myImage1.src = rollImage1[replacement].src;” onMouseOut=”document.myImage1.src = rollImage1[source].src;”> <img src="/”image1.jpg"” width=100 name=”myImage1” border=0> </a> 41 创建幻灯片引用内容程序代码 <script language=”JavaScript”> 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> <body onLoad=”slideShow(0)”> <img src="/”image1.jpg"” width=100 name=”slideShow”> 42 随机广告图片引用内容程序代码 <script language=”JavaScript”> 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] + ‘“><img src=”’ + imageList[imageChoice] + ‘“></a>’); </script> JavaScript就这么回事4：表单 43 表单构成引用内容程序代码 <form method=”post” action=”target.html” name=”thisForm”> <input type=”text” name=”myText”> <select name=”mySelect”> <option value=”1”>First Choice</option> <option value=”2”>Second Choice</option> </select> <br> <input type=”submit” value=”Submit Me”> </form> 44 访问表单中的文本框内容引用内容程序代码 <form name=”myForm”> <input type=”text” name=”myText”> </form> <a href='#' onClick='window.alert(document.myForm.myText.value);'>Check Text Field</a> 45 动态复制文本框内容引用内容程序代码 <form name=”myForm”> Enter some Text: <input type=”text” name=”myText”><br> Copy Text: <input type=”text” name=”copyText”> </form> <a href=”#” onClick=”document.myForm.copyText.value = document.myForm.myText.value;”>Copy Text Field</a> 46 侦测文本框的变化引用内容程序代码 <form name=”myForm”> Enter some Text: <input type=”text” name=”myText” onChange=”alert(this.value);”> </form> 47 访问选中的Select 引用内容程序代码 <form name=”myForm”> <select name=”mySelect”> <option value=”First Choice”>1</option> <option value=”Second Choice”>2</option> <option value=”Third Choice”>3</option> </select> </form> <a href='#' onClick='alert(document.myForm.mySelect.value);'>Check Selection List</a> 48 动态增加Select项引用内容程序代码 <form name=”myForm”> <select name=”mySelect”> <option value=”First Choice”>1</option> <option value=”Second Choice”>2</option> </select> </form> <script language=”JavaScript”> 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 验证表单字段引用内容程序代码 <script language=”JavaScript”> function checkField(field) { if (field.value == “”) { window.alert(“You must enter a value in the field”); field.focus(); } } </script> <form name=”myForm” action=”target.html”> Text Field: <input type=”text” name=”myField”onBlur=”checkField(this)”> <br><input type=”submit”> </form> 50 验证Select项引用内容程序代码 function checkList(selection) { if (selection.length == 0) { window.alert(“You must make a selection from the list.”); return false; } return true; } 51 动态改变表单的action 引用内容程序代码 <form name=”myForm” action=”login.html”> Username: <input type=”text” name=”username”><br> Password: <input type=”password” name=”password”><br> <input type=”button” value=”Login” onClick=”this.form.submit();”> <input type=”button” value=”Register” onClick=”this.form.action = ‘register.html’; this.form.submit();”> <input type=”button” value=”Retrieve Password” onClick=”this.form.action = ‘password.html’; this.form.submit();”> </form> 52 使用图像按钮引用内容程序代码 <form name=”myForm” action=”login.html”> Username: <input type=”text” name=”username”><br> Password: <input type=”password”name=”password”><br> <input type=”image” src="/”login.gif"” value=”Login”> </form> 53 表单数据的加密引用内容程序代码 <SCRIPT LANGUAGE='JavaScript'>  </SCRIPT> <form name='myForm' onSubmit='encryptForm(this); window.alert(this.myField.value);'> Enter Some Text: <input type=text name=myField><input type=submit> </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引用内容程序代码 <script language=”JavaScript”> window.status = “A new status message”; </script> 55 弹出确认提示框引用内容程序代码 <script language=”JavaScript”> var userChoice = window.confirm(“Click OK or Cancel”); if (userChoice) { document.write(“You chose OK”); } else { document.write(“You chose Cancel”); } </script> 56 提示输入引用内容程序代码 <script language=”JavaScript”> var userName = window.prompt(“Please Enter Your Name”,”Enter Your Name Here”); document.write(“Your Name is “ + userName); </script> 57 打开一个新窗口引用内容//打开一个名称为myNewWindow的浏览器新窗口程序代码 <script language=”JavaScript”> window.open(“ </script> 58 设置新窗口的大小引用内容程序代码 <script language=”JavaScript”> window.open(“ </script> 59 设置新窗口的位置引用内容程序代码 <script language=”JavaScript”> window.open(“ </script> 60 是否显示工具栏和滚动栏引用内容程序代码 <script language=”JavaScript”> window.open(“http://www.x- menubar=no); </script> 61 是否可以缩放新窗口的大小引用内容程序代码 <script language=”JavaScript”> window.open('http://www.x- , 'myNewWindow', 'resizable=yes' );</script> 62 加载一个新的文档到当前窗口引用内容程序代码 <a href='#' onClick='document.location = '125a.html';' >Open New Document</a> 63 设置页面的滚动位置引用内容程序代码 <script language=”JavaScript”> if (document.all) { //如果是IE浏览器则使用scrollTop属性 document.body.scrollTop = 200; } else { //如果是NetScape浏览器则使用pageYOffset属性 window.pageYOffset = 200; }</script> 64 在IE中打开全屏窗口引用内容程序代码 <a href='#' onClick=”window.open(' a full-screen window</a> 65 新窗口和父窗口的操作引用内容程序代码 <script language=”JavaScript”> //定义新窗口 var newWindow = window.open(“128a.html”,”newWindow”); newWindow.close(); //在父窗口中关闭打开的新窗口 </script>在新窗口中关闭父窗口程序代码 window.opener.close() 66 往新窗口中写内容引用内容程序代码 <script language=”JavaScript”> var newWindow = window.open(“”,”newWindow”); newWindow.document.open

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