为什么运行不了？求大神指点
<!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 open=confirm("确认新建窗口打开网站吗？");
if(open==true)
{var url=prompt("请输入你的网址："，"http://www.baidu.com");
if(url!==null)
{window.open(url,"_blank",'width=400px,height=500px,menubar=no,toolbar=no');}
else
{alert("再见！")；}
}
else
{alert("再见啦");}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>
