```javascript
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
var flag=window.confirm("确定要删除此条信息吗？");
if(flag==true){
alert("删除成功");
}else{
alert("你取消了删除");
}
</script>
</body>
</html>
我的浏览器出不来，显示404，我哪里出错了？
