废话不多说了,直接给大家贴代码了,具体代码如下所述:
<!DOCTYPE html>
<html lang=zh-cn>
<head>
<meta charset=UTF-8>
<meta name=viewport content=width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no>
<title>下拉菜单和滚动监听插件</title>
<link rel=stylesheet href=css/bootstrap.min.css>
<style>
</style>
</head