结合if判断
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<script>
function buttonUrl(){
if(confirm('是否打开慕课网?')){
if(prompt('下面网址是慕课网官网吗?','http://www.imooc.com')){
open('http://www.imooc.com','_blank','width=400,height=600,menbar=no,toolbar=no');
}
}
}
</script>
</head>
<body>
<button onclick="buttonUrl()">弹弹弹</button>
</body>
</html>
