                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JavaScript入门篇

求大神帮我看看哪错了

<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk"/>   <script type="text/javascript">
    function openWindow()
    {
    var a00=confirm("是否新建窗口网站") ;
    if(a00==true)
    {
        var b11=prompt("确认网址"，"http//www.imooc.com/");
        if(b11==null)
        {
            window.open('http//www.imooc.com/','_blank','width=400px,heught=500px,menubar=no,toolbar=no');
        }
        else{
            document.write("错误");
        }

     }
        else{
            document.write("错误");
        }
    }
    </script>
</head>
<body>
   <input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>