后台管理页面及标签，属性，群组选择器使用
<!doctype html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>10.19作业</title></head><style>/*标签选择器*/h1{ color:red;}/*属性选择器*/.h2{ color: #888888;}#h3{ color: #eeffcc;}/*群组选择器*/h4,h5,h6{ color: yellow;}</style><body><h1 style="color: black">后台管理页面</h1> <nav> <a href="" target="admin">首页</a> <a href="" target="admin">用户中心</a> <a href="" target="admin">订单列表</a> <a href="" target="admin">发货列表</a> <a href="" target="admin">商品管理</a> </nav> <iframe srcdoc="请选择导航栏..." name="admin" id="admin" frameborder="0" width="100%"></iframe> <h1>h1标签</h1> <h2 class="h2">h2标签</h2> <h3 id="h3">h3标签</h3> <h4>h4标签</h4> <h5>h5标签</h5> <h6>h6标签</h6></body></html>
代码执行效果
