<!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 open1=conform("新窗口打开网站");
if(open=ture)
{var open2=prompt("请输入您要打开的网址：","http://www.baidu.com");
if(open2=ture)
{window.open("open",_blank","width=400,height=500,menubar=no,toobar=no");
}
}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>
open1==true open2==true