麻烦老师帮我检查一下

来源：1-14 编程练习

木子小可爱

2019-09-07 17:06:38

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>打开/关闭页面</title>
    </head>
    <body>
       <input type="button" value="关闭本页面" id="close">
       <input type="button" value="打开慕课网" id="open">
       <script type="text/javascript">
        var btn1=document.getElementById("close");
        var btn2=document.getElementById("open");
        btn1.onclick=function(){
         window.close();
        }
        btn2.onclick=function(){
          window.open("http://www.imooc.com","慕课网");

        }
           //补充代码
       </script>
    </body>
</html>