console 命令行工具 X clear

console

document.write("Welcome to my class");

function callAlert(){
    alert('我被点了一下');
}

<!DOCTYPE html> 
<html>
<head>
<meta charset="utf-8" />
<title></title>
<link rel="stylesheet" type="text/css" href="index.css"/>
<script src="js/index.js"></script>
</head>
<body>
<button onclick="alert('我被点击了')">点我</button>
<button onclick="callAlert()">点我一下</button>
<script>
//alert("Hi！")
</script>
</html></body>