① 核心思路:5秒之后,就把这个广告隐藏起来 ② 用定时器setTimeout() <body> <img src="images/ad.jpg" alt="" class="ad"> <script> var ad = document.querySelector(\'.ad\'); setTimeout(function() { ad.style.display = \'none\'; }, 5000); </script> </body> 相关文章: