为什么不弹出窗口
劳烦大家看一下,谢谢
<!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("是否打开新窗口");
if(open==true)
{
var url=prompt("确认打开新网址?","www.baidu.com");
if(url!=null)
{
window.open(url,"_blank","width=400,height=500,menubar=no,toolbar=no");
}
else
{
alert("打开失败");
}
else
{
alert("打开失败");
}
}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>