写的可以嘛？
<!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 my=confirm("是否打开？");
if(my==true){
window.open('http：//www.imooc.com/','_blank','width=400px,height=500px')
}else{
document.write("不用打开");
}
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>
