JavaScript第一步
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JavaScript</title>
<script type="text/javascript" src="demo.js">
</script>
</head>
<body>
</body>
</html>
再新建一个demo.js文件.
alert("Hello World");
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JavaScript</title>
<script type="text/javascript" src="demo.js">
</script>
</head>
<body>
</body>
</html>
再新建一个demo.js文件.
alert("Hello World");
