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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(“strongHello/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(“pHere's some information about this document:/p”);
3: document.write(“ul”);
4: document.write(“liReferring Document: “ + document.referrer + “/li”);
5: document.write(“liDomain: “ + document.domain + “/li”);
6: document.write(“liURL: “ + document.URL + “/li”);
7: document.write(“/ul”);
8: /script
28 输出换行
1: document.writeln(“stronga/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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