                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JavaScript入门篇

来找茬找错误

<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk"/>
<script type="text/javascript">
function dow()
{

   var new=confirm("是否打开新窗口?");
    if(new==true)
    {
        var su=prompt("输入网址","http://www.imooc.com/");
     if(su!=null)
     {
     window.open("http://www.imooc.com/",'width=400,height=500,menubar=no,toolar=no');
     }

    else
    {
        alert("88!");

        }
    }
        else
        {
        alert("再见");
        }

}
</script>
</head>
<body>
      <input type="button" value="新窗口打开网站" onclick="dow()" />
</body>

</html>