创建脚本块

<script language=”JavaScript”>

JavaScript code goes here

</script>

隐藏脚本代码

<script language=”JavaScript”>

<>

</script>

浏览器不支持的时候显示

<noscript>

Hello to the non-JavaScript browser.

</noscript>

链接外部脚本文件

<script language=”JavaScript” src="http://www.jb51.net”youname.js"”></script>

注释脚本

// This is a comment

document.write(“Hello”); // This is a comment

/*

All of this

is a comment

*/

输出到浏览器

document.write(“<strong>输出内容</strong>”);

定义变量

var myVariable = “some value”;

字符串相加

var myString = “String1” + “String2”;

字符串搜索

<script language=”JavaScript”>

<>

</script>

字符串替换

thisVar.replace(“Monday”,”Friday”);

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