Java Script方法和技巧大全
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: place(“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.LowerCase() “<br>”);
16: document.UpperCase() “<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 = firm(“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="/”: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 = firm(“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
java replace方法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: “ ferrer “</li>”);
5: document.write(“<li>Domain: “ document.domain “</li>”);
6: document.write(“<li>URL: “ document.URL “</li>”);
7: document.write(“</ul>”);
8: </script>

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