请问哪里错了
<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
function openWindow()
{var open=confirm("确认新建窗口打开网站吗?")
if(open==ture)
{
var url=prompt("通过确认对话框,确认打开窗口"," http://www.imooc.com/")
if(url!=null)
{
window.open(url,"blank",'width=400,height=500,menubar=no,toolbar=no')
}
else
{alert("再见!")}
}
else
{alert("拜拜")}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>