整理的比较不错的JavaScript的方法和技巧第1/3页


答案：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 


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=>2: <a href=>


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>
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