点了按钮没有反应
<!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 mystyle = confirm("你确定要打开慕课网吗？");
if (mystyle==ture)
{var url=prompt("是否要打开网址？","http://www.imooc.com");
if(url!==null)
{window.open(url,'_blank','width=400px,height=500px,menubar=no,toolbar=no,status=no,scrollbars=yes');}
else
{alert(再见！地球人！);}
}
else
{alert(再见！地球人！);}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>
