我要疯了,求大神们帮忙
<!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 myconfirm=confirm("是否打开新窗口?");
if(myconfirm==true)
{var myprompt=prompt("请输入网址","http://www.imooc.com/")
if(myprompt!=null)
{
window.open('http://www.imooc.com/','_blank','width=400px,height=500px,menubar=no,toolbar=no')
};
else
{alert("你没有写网址!")};
};
else
{alert("你没有打开新窗口!")};
};
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>