console 命令行工具 X clear

console

document.write("Have a good day~")

 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')">点我</button>
    <button onclick="alert('我被点了一下')">点我一下</button>
        <script>
            //alert("Hi!");
    </script>
</body>
</html>