WEB前端知识大整合之JS网站定时弹出广告
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <!-- 1. 确定事件: 页面加载完成的事件 onload 2. 事件要触发函数: init() 3. init函数里面做一件事: 1. 启动一个定时器 : setTimeout() 2. 显示一个广告 1. 再去开启一个定时5秒钟之后,关闭广告 --> <script> function init(){ setTimeout("showAD()",3000); } function showAD(){ //首先要获取要操作的img var img = document.getElementById("img1"); //显示广告 img.style.display = "block"; //再开启定时器,关闭广告 setTimeout("hideAD()",3000); } function hideAD(){ //首先要获取要操作的img var img = document.getElementById("img1"); //隐藏广告 img.style.display = "none"; } </script> </head> <body onload="init()"> <img id="img1" src="../img/f001a62f-a49d-4a4d-b56f-2b6908a0002c_g.jpg" width="100%" style="display: none;"/> </body> </html>
图片显示吟诗
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script> //文档加载顺序 // var img = document.getElementById("img1"); function hideImg(){ var img = document.getElementById("img1"); img.style.display = "none"; } function showImg(){ var img = document.getElementById("img1"); img.style.display = "block"; } </script> </head> <body> <input type="button" value="显示" onclick="showImg()" /> <input type="button" value="隐藏" onclick="hideImg()" /><br /> <img src="../img/1-161104143944.gif" id="img1" /> </body> </html>