console 命令行工具 X clear

console

document.write("Welcome") 
function.callAlert(){
    alert('我被点了一下');
}
 window.onload = function () {
            alert('欢迎光临萌萌小店！');
        }
        window.onbeforeunload = function (event) {
            var e = event || window.event;
            e.returnValue = "记得下来再来喔！";

<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <!--script>
        function callAlert(){
            alert('我被点了一下');
        }
    </script-->
</head>
<body>
    <button onclick="alert('我被点击')">点击</button>
    <button onclick="callAlert()">点击一下</button>
    <!--2、在body中引入-->
    <script>
       // alert("Hi")
    </script>
</body>
</html>