代码：

1.内部写入JavaScript程序

  1.1

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我的第一个JavaScript程序</title>
</head>

<body>
  <a href="JavaScript:alert('Hello,JavaScript!');">点击我</a>
</body>
</html>

   1.2

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我的第一个JavaScript程序</title>
<script type="text/javascript">
 alert('Hello,JavaScript!');
</script>
</head>

<body>
  <a href="JavaScript:alert('Hello,JavaScript!');">点击我</a>
</body>
</html>

2.外部导入JavaScript程序

  2.1

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我的第一个JavaScript程序</title>
<script src="outer.js" type="text/javascript">
</script>
</head>

<body>
  <a href="JavaScript:alert('Hello,JavaScript!');">点击我</a>
</body>
</html>

  2.1

 outer.js 

 alert('Hello,JavaScript!');


2.2 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我的第一个JavaScript程序</title>
<script src="outer.js" type="text/javascript">
</script>
</head>

<body>
  <a href="JavaScript:show();">点击我</a>
</body>
</html>

outer.js 

// JavaScript Document

 alert('Hello,JavaScript!');
 
 function show(){
	 alert('Hello,JavaScript!');
 }

制作截图：


知识点总结：







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