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: <>
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="http://www.jb51.net"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: <>
7: </script>
10 字符串替换
1: thisVar.replace(“Monday","Friday");
11 格式化字串
1: <script language="JavaScript">
2: <>
21: </script>
12 创建数组
1: <script language="JavaScript">
2: <>
11: </script>
13 数组排序
1: <script language="JavaScript">
2: <>
11: </script>
14 分割字符串
1: <script language="JavaScript">
2: <>
10: </script>
15 弹出警告信息
1: <script language="JavaScript">
2: <>
5: </script>
16 弹出确认框
1: <script language="JavaScript">
2: <>
5: </script>
17 定义函数
1: <script language="JavaScript">
2: <>
8: </script>
18 调用JS函数
1: <a href="#">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: <>
7: </script>
21 指定次数循环
1: <script>
2: <>
11: </script>
22 设定将来执行
1: <script>
2: <>
8: </script>
23 定时执行函数
1: <script>
2: <>
9: </script>
24 取消定时执行
1: <script>
2: <>
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>
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