为什么点开没有反应,求助大神
<!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("确认是否去深圳?");
if(open==true)
{var url=prompt("通过对话框输入网址","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!");}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>