<!DOCTYPE html><html lang="zh-CN"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>网站管理后台系统</title> <style> h1{ color: red; } .blue{ color: blue; } #green{ color: green; } h4,h5,h6{ color: yellow; } </style></head><body> <header><h1>网站后台管理系统</h1></header> <section> <p>admin</p> <button onclick="location.href='logout.php'">退出</button> </section> <nav> <a href="./test.html" target="admin">课程表</a> <a href="./表单初试.html" target="admin">用户注册管理</a> <a href="./img/video/1.mp4" target="admin">视频管理</a> <a href="https://image.baidu.com/search/index?tn=baiduimage&ct=201326592&lm=-1&cl=2&ie=gb18030&word=%C3%C0%C5%AE&fr=ala&ala=1&alatpl=normal&pos=0&dyTabStr=MCwzLDIsMSw1LDgsNCw3LDYsOQ%3D%3D" target="admin">美女素材</a> <a href="./导航.html" target="admin">导航系统</a> </nav><iframe srcdoc="欢迎来到管理系统" name="admin" style='width: 1500px; height: 200px; '></iframe> <div> <h1>一级</h1> <h2 class="blue">二级</h2> <h3 id="green">三级</h3> <h4>四级</h4> <h5>五级</h5> <h6>六级</h6> </div></body></html>
